Match ends, Olympiakos 1, Arsenal 3.

Second Half ends, Olympiakos 1, Arsenal 3.

Corner, Arsenal. Conceded by Sokratis Papastathopoulos.

Attempt missed. Nicolas Pépé (Arsenal) right footed shot from the centre of the box is high and wide to the right. Assisted by Alexandre Lacazette.

Substitution, Arsenal. Alexandre Lacazette replaces Pierre-Emerick Aubameyang.

Substitution, Olympiakos. Thanasis Androutsos replaces Giorgos Masouras.

Goal! Olympiakos 1, Arsenal 3. Mohamed Elneny (Arsenal) right footed shot from outside the box to the bottom right corner. Assisted by Gabriel Magalhães.

Substitution, Arsenal. Nicolas Pépé replaces Bukayo Saka.

Substitution, Arsenal. Emile Smith Rowe replaces Martin Ødegaard.

Substitution, Arsenal. Mohamed Elneny replaces Willian.

Goal! Olympiakos 1, Arsenal 2. Gabriel Magalhães (Arsenal) header from the centre of the box to the bottom right corner. Assisted by Willian with a cross following a corner.

Corner, Arsenal. Conceded by Andreas Bouchalakis.

Attempt blocked. Martin Ødegaard (Arsenal) left footed shot from outside the box is blocked. Assisted by Pierre-Emerick Aubameyang.

Substitution, Olympiakos. Ahmed Hassan Mahgoub replaces Youssef El-Arabi.

Willian (Arsenal) wins a free kick in the defensive half.

Foul by Youssef El-Arabi (Olympiakos).

Attempt missed. Willian (Arsenal) left footed shot from outside the box is too high. Assisted by Martin Ødegaard.

Martin Ødegaard (Arsenal) wins a free kick in the attacking half.

Foul by Youssef El-Arabi (Olympiakos).

Foul by Martin Ødegaard (Arsenal).

Mohamed Mady Camara (Olympiakos) wins a free kick in the defensive half.

Attempt blocked. Martin Ødegaard (Arsenal) left footed shot from the right side of the box is blocked. Assisted by Dani Ceballos.

Attempt blocked. Bukayo Saka (Arsenal) left footed shot from the right side of the box is blocked. Assisted by Martin Ødegaard.

Corner, Olympiakos. Conceded by Héctor Bellerín.

Attempt blocked. Youssef El-Arabi (Olympiakos) right footed shot from the centre of the box is blocked. Assisted by Lazar Randjelovic.

Willian (Arsenal) wins a free kick in the attacking half.

Foul by Sokratis Papastathopoulos (Olympiakos).

Gabriel Magalhães (Arsenal) wins a free kick in the defensive half.

Foul by Youssef El-Arabi (Olympiakos).

Granit Xhaka (Arsenal) wins a free kick in the attacking half.

Foul by Giorgos Masouras (Olympiakos).

Foul by Willian (Arsenal).

Andreas Bouchalakis (Olympiakos) wins a free kick in the attacking half.

Substitution, Olympiakos. Lazar Randjelovic replaces Bruma.

Goal! Olympiakos 1, Arsenal 1. Youssef El-Arabi (Olympiakos) right footed shot from outside the box to the centre of the goal.

Substitution, Arsenal. Dani Ceballos replaces Thomas Partey.

Offside, Arsenal. Martin Ødegaard tries a through ball, but Héctor Bellerín is caught offside.

Attempt blocked. Bukayo Saka (Arsenal) left footed shot from outside the box is blocked.

Thomas Partey (Arsenal) wins a free kick in the defensive half.

Foul by Giorgos Masouras (Olympiakos).

Attempt saved. Thomas Partey (Arsenal) right footed shot from outside the box is saved in the bottom left corner. Assisted by Willian.

Second Half begins Olympiakos 0, Arsenal 1.

Substitution, Olympiakos. Konstantinos Fortounis replaces Mathieu Valbuena.

Substitution, Olympiakos. José Holebas replaces Oleg Reabciuk.

First Half ends, Olympiakos 0, Arsenal 1.

Corner, Arsenal. Conceded by Sokratis Papastathopoulos.

Gabriel Magalhães (Arsenal) is shown the yellow card for a bad foul.

Foul by Gabriel Magalhães (Arsenal).

Mathieu Valbuena (Olympiakos) wins a free kick in the attacking half.

Attempt saved. Willian (Arsenal) right footed shot from the left side of the box is saved in the top centre of the goal. Assisted by Bukayo Saka.

Attempt missed. Giorgos Masouras (Olympiakos) right footed shot from the left side of the box is high and wide to the right.

Attempt blocked. Youssef El-Arabi (Olympiakos) left footed shot from the centre of the box is blocked. Assisted by Bruma.

Andreas Bouchalakis (Olympiakos) is shown the yellow card for a bad foul.

Pierre-Emerick Aubameyang (Arsenal) wins a free kick in the defensive half.

Foul by Andreas Bouchalakis (Olympiakos).

Goal! Olympiakos 0, Arsenal 1. Martin Ødegaard (Arsenal) left footed shot from outside the box to the high centre of the goal. Assisted by Thomas Partey.

Attempt blocked. Pierre-Emerick Aubameyang (Arsenal) right footed shot from the left side of the box is blocked. Assisted by Martin Ødegaard.

Attempt blocked. Granit Xhaka (Arsenal) left footed shot from outside the box is blocked.

Bukayo Saka (Arsenal) wins a free kick in the attacking half.

Foul by Oleg Reabciuk (Olympiakos).

Attempt saved. Pierre-Emerick Aubameyang (Arsenal) right footed shot from outside the box is saved in the top right corner.

Yann M'Vila (Olympiakos) is shown the yellow card for a bad foul.

Bukayo Saka (Arsenal) wins a free kick in the attacking half.

Foul by Yann M'Vila (Olympiakos).

Attempt saved. Bruma (Olympiakos) right footed shot from the centre of the box is saved in the centre of the goal.

Foul by Pierre-Emerick Aubameyang (Arsenal).

Sokratis Papastathopoulos (Olympiakos) wins a free kick on the right wing.

Attempt saved. David Luiz (Arsenal) right footed shot from outside the box is saved in the top centre of the goal.

Willian (Arsenal) wins a free kick in the attacking half.

Foul by Kenny Lala (Olympiakos).

Kieran Tierney (Arsenal) wins a free kick in the defensive half.

Foul by Bruma (Olympiakos).

Attempt missed. Thomas Partey (Arsenal) right footed shot from outside the box is too high. Assisted by Martin Ødegaard.

Attempt blocked. Mohamed Mady Camara (Olympiakos) left footed shot from outside the box is blocked.

Bukayo Saka (Arsenal) wins a free kick in the defensive half.

Foul by Mathieu Valbuena (Olympiakos).

Corner, Arsenal. Conceded by Sokratis Papastathopoulos.

Attempt saved. Pierre-Emerick Aubameyang (Arsenal) header from the centre of the box is saved in the top centre of the goal. Assisted by Héctor Bellerín with a cross.

Offside, Olympiakos. Yann M'Vila tries a through ball, but Youssef El-Arabi is caught offside.

Foul by Bukayo Saka (Arsenal).

Oleg Reabciuk (Olympiakos) wins a free kick in the defensive half.

Attempt missed. Martin Ødegaard (Arsenal) left footed shot from the centre of the box is close, but misses to the right. Assisted by Kieran Tierney with a cross.

Granit Xhaka (Arsenal) wins a free kick in the attacking half.

Foul by Youssef El-Arabi (Olympiakos).

First Half begins.

Lineups are announced and players are warming up.