Oliver Glasner is walking into a tactical minefield at Nottingham Forest

Evangelos Marinakis does not do patience. If you need proof, look no further than last week's sacking of Vítor Pereira. The Portuguese coach kept Nottingham Forest in the top flight last term.

He even guided them to a European semi-final, eventually falling to Aston Villa in the Europa League. Yet, a week later, he is out.

In his place steps Oliver Glasner, a manager who knows all about winning silverware under pressure. As Sky Sports confirmed today, the Austrian has taken charge at the City Ground. It is a sensational appointment, but it is also a tactical collision waiting to happen.

Glasner is walking into a club that has gone through five managers in the last twelve months. The club has ambition, but it lacks structural stability.

Glasner's arrival is a massive statement of intent from the Forest hierarchy. But the tactical transition from Pereira's defensive pragmatism to Glasner's aggressive verticality will not be easy.

Pre-season begins immediately, and Glasner has only six weeks to prepare. His first test is a home match against Leeds United on August 22, 2026.

The margin for error is non-existent. The fans will demand immediate progress, but rebuilding a squad's tactical identity takes time.

The Selhurst Park Grudge and the UEFA Soap Opera

The friction surrounding Glasner's arrival in Nottingham goes beyond simple career movement. It is deeply rooted in a bitter institutional rivalry between Forest and Crystal Palace.

Last season, the two clubs went head-to-head for a place in the Europa League. UEFA ultimately ruled in Forest's favor, leaving Palace excluded.

The south London club was banned from the competition because their previous co-owner, John Textor, held a controlling stake in Lyon. That technicality allowed Forest to take Palace's place in the tournament. The fallout was immediate and hostile.

During their Premier League match at Selhurst Park on August 24, 2025, Palace fans displayed a graphic banner targeting Marinakis. The match ended in a 1-1 draw, but the FA later charged Palace with misconduct. The resentment has not faded.

Despite the Europa League exclusion, Glasner guided Palace to European success anyway. They won the Conference League in May 2026, defeating Rayo Vallecano 1-0 in the final. That victory secured Palace a Europa League spot for the upcoming season.

Forest, conversely, failed to secure European football after their semi-final exit against Villa. This leaves Forest without continental competition, while Palace move up. The irony is stark.

Tellingly, Nottingham Forest announced Glasner's arrival without mentioning Crystal Palace by name. They listed Wolfsburg and Eintracht Frankfurt.

They acknowledged his achievements in south London but omitted the club's name entirely. The pettiness is deliberate.

The Tactical Shift: From Low Block to Vertical Press

Glasner's tactical identity is defined by his structured 3-4-2-1 formation. He demands a high-intensity press and rapid vertical transitions. At Frankfurt and Palace, his teams relied on wing-backs to stretch the opponent's defensive line.

Under Pereira, Forest played a very different brand of football. They sat deep, defended their box, and looked to hit opponents on the counter. Pereira's priority was survival, and the squad was built for that purpose.

Glasner will demand a much more proactive defensive posture. He wants his players to win the ball high up the pitch to exploit unsettled defensive lines. This transition requires a significant physical adjustment.

"Nottingham Forest is a club with incredible prestige and history, a two-time European Champion with one of the most passionate fan bases in football."

The current squad lacks the midfield profile required to execute Glasner's double pivot. In his successful teams, Glasner used dynamic central midfielders who could cover ground quickly and press aggressively. Forest's current central midfielders are more suited to holding positions.

If the midfield cannot execute the press, the defensive line will be exposed. Glasner's high defensive line requires center-backs who are comfortable defending in wide channels. Forest's defenders will be forced to play in open space much more often than they did under Pereira.

We must also look at the physical demands of this style. Glasner's pressing system requires peak physical conditioning.

The six-week pre-season will be grueling for a squad accustomed to a low block. Any physical drop-off will be punished in the Premier League.

Furthermore, the squad must adapt to a three-at-the-back system. Forest's defenders must learn new positioning rules under Glasner. The transition from a back four to a back three often leads to early-season defensive errors.

The Leeds United Test: What to Watch on August 22

The season opener against Leeds United will reveal how much of Glasner's philosophy has been absorbed. Leeds are a high-energy team that thrives on chaotic transitions. They will look to disrupt Forest's build-up from the opening whistle.

Glasner's priority in pre-season must be organizing the wing-backs. If the wing-backs push too high without defensive cover, Leeds will exploit the vacant space. Forest's defensive transition must be disciplined.

The tactical battle in central midfield will decide the match. Leeds will look to overload the center of the pitch to force turnovers. Forest's double pivot must remain composed under intense pressure.

We must watch the movement of Forest's two attacking midfielders behind the striker. In Glasner's system, these players are responsible for creating central overloads. They must find space between Leeds' defensive and midfield lines.

If they are isolated, Forest's attack will become predictable. Glasner needs his creative players to take risks in possession. The passing must be sharp, vertical, and precise.

Leeds will target Forest's newly formed back three. They will try to isolate Forest's wide center-backs in one-on-one situations. The communication between Forest's defenders must be flawless to prevent simple breakthroughs.

Pre-season friendlies will give us a hint of how Glasner intends to line up. We will see which players are capable of meeting his high physical standards. The starting eleven on August 22 might surprise a few fans.

The Verdict and Prediction

Glasner is a proven winner, but the Forest job is a different beast. The club's leadership demands immediate results, but tactical revolutions take time. A slow start will put Glasner under intense pressure from the board.

Leeds United are a difficult opening opponent because their tactical style is already established. They will arrive at the City Ground with a clear identity. Forest, by contrast, will still be adapting to a new tactical framework.

I expect a chaotic, high-intensity match with plenty of transitional moments. Forest will struggle to control possession early on. Leeds will look to exploit the lack of cohesion in Forest's defensive line.

However, Glasner's teams are always dangerous on the counter. Even if the collective press is not fully functional, individual quality in transition can decide the game. Forest will have moments of vulnerability, but they will also create high-value chances.

My prediction is a hard-fought 2-2 draw. Leeds will take an early lead by exploiting space behind Forest's left wing-back.

Forest will respond in the second half as Glasner adjusts his midfield structure. It will be an entertaining but nervous afternoon for the City Ground faithful.