Glasner to Forest: A Back-Three Revolution on Trentside

A New Architect for the City Ground

Nottingham Forest are pivoting once again. The club has moved swiftly to sack Vitor Pereira and install Oliver Glasner as his successor, making the Austrian the club's fifth head coach in less than a year. This is not a cosmetic appointment. It is a declaration of intent about how Forest intend to play, press, and project themselves in the Premier League.

Forest were offered the chance to appoint Glasner on a three-year contract after he left Crystal Palace at the end of the season and felt it too good an opportunity to turn down. The club had a break clause they could activate in June in Pereira’s contract, which they did late on Tuesday. Glasner's stock has never been higher. The Austrian's reputation was forged across two transformative spells: first at Eintracht Frankfurt, where he masterminded a Europa League triumph in 2022, and then at Crystal Palace, where he inherited a side drifting toward relegation and steered them to FA Cup glory. In both jobs, the tactical DNA was unmistakable. Where Forest go from here depends entirely on how quickly the squad absorbs it.

The Glasner Blueprint

To understand what Forest are buying into, you have to start with the back three. Glasner is married to a 3-4-2-1 or 3-4-3 shape, not as a defensive concession but as an offensive weapon. The three centre-backs provide a numerical superiority in build-up, allowing the wing-backs to push high and wide while the double pivot in midfield controls the tempo. It is a system that demands specific profiles: ball-playing defenders who can step into midfield, wing-backs who function as auxiliary wingers, and a number ten who operates in the half-spaces with creative licence.

At Frankfurt, this manifested in devastating fashion. Filip Kostic on the left flank became one of Europe's most productive players, his delivery from wide positions feeding a fluid front three. At Palace, it was Eberechi Eze and Michael Olise who thrived in the dual number ten roles, drifting between the lines and exploiting the channels that the wing-backs' width created. The system does not rely on a single creator. It manufactures overloads across the pitch.

What separates Glasner from other back-three advocates is the pressing structure. His teams do not sit in a 5-4-1 low block and counter. They press aggressively from the front, with the striker engaging the ball-side centre-back and the two tens cutting off passing lanes into midfield. The wing-backs then compress the space, squeezing the opposition into uncomfortable zones. It is a high-intensity man-oriented press that requires supreme fitness and spatial awareness. When it works, it suffocates opponents. When it misfires, the gaps between the lines can be punishing.

What the Numbers Told Us at Palace

Glasner's Palace side posted some instructive underlying metrics during his tenure:

• Pressing intensity ranked among the top five in the Premier League under his stewardship
• Palace averaged significantly more final-third entries per match compared to the pre-Glasner period
• Defensive transitions improved markedly, with the high line catching opponents offside with increased frequency
• Set-piece productivity surged, a hallmark of Glasner's detailed coaching on dead-ball situations

The Pereira Chapter

Pereira's time at the City Ground was always a marriage of convenience rather than conviction. The Portuguese coach brought tactical rigour and a preference for structured possession, but the results never matched the ambition. Forest's defensive record showed improvement in patches, but the attacking output remained inconsistent. Pereira's preferred 4-2-3-1 relied heavily on the creative output of the number ten and the inverted wingers, but the squad's profile did not always align with his demands.

There was a philosophical tension at the heart of Pereira's tenure. He wanted controlled, methodical build-up play, but Forest's most dangerous moments often came in transition. The squad's strengths lie in pace on the flanks and aerial presence in the box, attributes that suit a more direct, vertical approach. Pereira tried to impose a continental passing structure onto a squad built for Premier League physicality. The disconnect was visible in results, and the club ultimately decided to activate the break clause in his contract to end his tenure.

Tactical Shift: Why Glasner Fits Forest's Profile

This is where the appointment starts to make structural sense. Forest's recruitment over recent windows has prioritised athleticism and versatility. The squad possesses players capable of operating as wing-backs, centre-backs comfortable carrying the ball forward, and forwards who can press from the front. Glasner's system demands exactly these traits.

The transition from a back four to a back three is the most visible change, but the deeper shifts matter more. Under Glasner, expect the wide players to adopt more disciplined defensive roles, tracking opposition full-backs rather than drifting inside. The midfield pivot will need to cover enormous ground, screening the defence while also supporting attacks with late runs into the box. And the front three will be tasked with leading the press, forcing errors high up the pitch rather than dropping deep to collect possession.

"We don't wait for the perfect moment. We build the shape that creates the moment." — Glasner's philosophy, articulated during his Crystal Palace tenure

The risk, as with any mid-season appointment, is time. Glasner's systems are intricate. They require repetition on the training ground, an understanding of triggers and cues that cannot be absorbed in a single week. At Palace, it took roughly six to eight weeks before the tactical patterns became instinctive. Forest may not have that luxury in a congested Premier League table.

The Recruitment Question

Glasner's arrival inevitably raises questions about the January and summer transfer windows. If Forest commit to the back three, they will need:

• At least one more centre-back comfortable in a three-man unit
• A dynamic wing-back on the right side who can provide width and defensive cover
• A creative number ten capable of operating between the lines

The existing squad offers partial solutions. Several defenders can adapt to a back three, and the current wide players may transition into wing-back roles. But the dual ten positions behind the striker will be where Glasner's recruitment priorities lie. At Palace, Eze and Olise were irreplaceable components. Finding equivalent profiles, or developing them internally, will determine whether the system reaches its ceiling.

What This Means for the Premier League

Glasner's move to Forest adds another tactically ambitious coach to a Premier League that is increasingly defined by its dugouts. The Austrian joins a cohort of managers who favour proactive, pressing football, and his track record suggests he will not compromise on style regardless of the opponent. This is a coach who went to the Etihad and pressed Manchester City high. He does not flinch.

For Forest, the appointment signals an evolution rather than a revolution. The club has cycled through five managers in less than a year with varying philosophies, creating a patchwork squad that lacks a coherent identity. Glasner offers the clearest tactical roadmap Forest have had in years. Whether the players can execute it determines everything.

Looking Ahead

The immediate fixtures will be revealing. Glasner's first priority will be establishing defensive solidity in the new shape, likely starting with a compact 5-3-2 in defensive phases before gradually expanding into the more aggressive pressing structure he favours. The early matches will feature a pragmatic, security-first approach.

Beyond the short term, the fixture list offers a compelling test of Glasner's adaptability. Matches against sides who play through the press will examine whether Forest's centre-backs can handle the positional demands of a three-man line. Games against low-block opponents will test the wing-backs' ability to create width and deliver quality into the box. Every fixture becomes a tactical examination.

Nottingham Forest have not hired a caretaker. They have hired a coach with a defined system, proven credentials, and the tactical conviction to impose his identity on a squad that desperately needs one. The Glasner era at the City Ground begins now, and it begins with a back three.

Updated: 2026-07-01 — Confirmed Pereira sacking via June contract break clause; noted Glasner will be Forest's fifth head coach in under a year.