Ajax fans and Portuguese police clash inside the stadium during their side's 1-1 draw at Benfica
Ajax came from behind to rescue a Champions League point at Benfica, during a Group E match marred by violence in the stands.
Police and supporters clashed in the away end at the Estadio da Luz, where former Southampton striker Dusan Tadic cancelled out Goncalves Oliveira's opener.
Ajax could have progressed to the knockout stages had they won.
The Dutch side travel to Athens to face AEK Athens in their next match on 27 November, knowing a victory will take them through.
Benfica still stand an outside chance of progression, but they will need to win both games and hope Ajax drop five or more points in their remaining two fixtures.
Robert Lewandowski's two goals saw Bayern Munich beat AEK Athens 2-0 to all but seal their progress to the knockout stages - the German champions need just a point from their next match.
Elsewhere, Hoffenheim came from two goals down to draw level in the 92nd minute at Lyon as the Frenchmen lost ground on Manchester City in Group F.
Valencia claimed their first victory of the campaign with a 3-1 win over Young Boys courtesy of goals by Mina Lorenzo and Carlos Soler in Group H's early kick-off.
Roma beat CSKA Moscow 2-1 as the Italian side continue to keep pace with holders Real Madrid in Group G.
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Line-ups
Match Stats
Live Text
Line-ups
Benfica
99Vlachodimos
34Magalhães de Almeida
6Rúben Dias
33Nivaldo VieiraBooked at 70mins
3Grimaldo
5FejsaBooked at 45mins
18SalvioSubstituted forFerreira Silvaat 48'minutes
83Carvalho FernandesSubstituted forAfonso Fernandesat 75'minutes
8Appelt Pires
11Cervi
10Gonçalves OliveiraBooked at 39minsSubstituted forSeferovicat 55'minutes
Substitutes
1Svilar
14Seferovic
16Semedo
20Krovinovic
21Afonso Fernandes
27Ferreira Silva
30Castillo
Ajax
24Onana
12Mazraoui
4de LigtBooked at 42mins
17Blind
31TagliaficoBooked at 34mins
20Schöne
21de JongSubstituted forWöberat 86'minutes
22Ziyech
6van de BeekBooked at 72mins
7NeresSubstituted forDolbergat 74'minutes
10TadicBooked at 83mins
Substitutes
2Kristensen
5Wöber
9Huntelaar
19Labyad
25Dolberg
26Lamprou
30de Wit
Referee:
Gianluca Rocchi
Attendance:
51,328
Match Stats
Home TeamBenficaAway TeamAjax
Possession
Home42%
Away58%
Shots
Home12
Away10
Shots on Target
Home8
Away4
Corners
Home2
Away2
Fouls
Home18
Away14
Live Text
Posted at
Match ends, Benfica 1, Ajax 1.
Full TimePosted at 90'+6'
Second Half ends, Benfica 1, Ajax 1.
Posted at 90'+5'
Attempt saved. Gabriel Pires (Benfica) left footed shot from the centre of the box is saved in the centre of the goal.
Posted at 90'+5'
Attempt blocked. André Almeida (Benfica) left footed shot from the centre of the box is blocked. Assisted by Haris Seferovic.
Posted at 90'+5'
Attempt blocked. Rúben Dias (Benfica) header from the centre of the box is blocked. Assisted by Pizzi with a cross.
Posted at 90'+4'
Corner, Benfica. Conceded by Maximilian Wöber.
Posted at 90'+4'
Attempt saved. Rafa (Benfica) right footed shot from the right side of the box is saved in the bottom right corner. Assisted by Haris Seferovic.
Posted at 90'+4'
Attempt missed. Hakim Ziyech (Ajax) left footed shot from outside the box is too high. Assisted by Kasper Dolberg.
Posted at 90'+3'
Nicolás Tagliafico (Ajax) wins a free kick in the defensive half.
Posted at 90'+3'
Foul by Pizzi (Benfica).
Posted at 90'+1'
Nicolás Tagliafico (Ajax) wins a free kick in the defensive half.
Posted at 90'+1'
Foul by Haris Seferovic (Benfica).
Posted at 90'
Attempt missed. Hakim Ziyech (Ajax) left footed shot from outside the box is close, but misses to the left. Assisted by Daley Blind.
Posted at 89'
Nicolás Tagliafico (Ajax) wins a free kick in the defensive half.
Posted at 89'
Foul by Haris Seferovic (Benfica).
Posted at 89'
Foul by Kasper Dolberg (Ajax).
Posted at 89'
Jardel (Benfica) wins a free kick in the defensive half.
Posted at 87'
Kasper Dolberg (Ajax) wins a free kick in the attacking half.
Posted at 87'
Foul by Pizzi (Benfica).
SubstitutionPosted at 86'
Substitution, Ajax. Maximilian Wöber replaces Frenkie de Jong because of an injury.
Posted at 84'
Hakim Ziyech (Ajax) wins a free kick in the defensive half.
Posted at 84'
Foul by Franco Cervi (Benfica).
BookingPosted at 83'
Dusan Tadic (Ajax) is shown the yellow card.
Posted at 83'
Delay over. They are ready to continue.
Posted at 82'
Delay in match Frenkie de Jong (Ajax) because of an injury.
Posted at 82'
Corner, Ajax. Conceded by Jardel.
Posted at 82'
Attempt blocked. Hakim Ziyech (Ajax) left footed shot from outside the box is blocked. Assisted by Frenkie de Jong.
Posted at 81'
Attempt saved. Haris Seferovic (Benfica) left footed shot from the left side of the box is saved in the top centre of the goal. Assisted by Gabriel Pires with a through ball.
Posted at 80'
Frenkie de Jong (Ajax) wins a free kick in the defensive half.
Posted at 80'
Foul by Haris Seferovic (Benfica).
Posted at 79'
Kasper Dolberg (Ajax) wins a free kick in the attacking half.
Posted at 79'
Foul by Lubomir Fejsa (Benfica).
Posted at 78'
Noussair Mazraoui (Ajax) wins a free kick in the defensive half.
Posted at 78'
Foul by Lubomir Fejsa (Benfica).
Posted at 77'
Offside, Benfica. Jardel tries a through ball, but Haris Seferovic is caught offside.
Posted at 76'
Foul by Dusan Tadic (Ajax).
Posted at 76'
André Almeida (Benfica) wins a free kick in the defensive half.
SubstitutionPosted at 75'
Substitution, Benfica. Pizzi replaces Gedson Fernandes.
SubstitutionPosted at 74'
Substitution, Ajax. Kasper Dolberg replaces David Neres.
BookingPosted at 72'
Donny van de Beek (Ajax) is shown the yellow card for a bad foul.
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Source: bbc.com