Agu does well to control and then clear a looping cross from the right. He's quietly had a really good game for Vitoria tonight.
74'
Alexandre Lacazette replaced by Nicolas Pépé.
70'
Edwards replaced by Pereira.
68'
Arsenal's attack eventually breaks down as Ceballos can't quite keep the ball in after a deflection looked to have given him a good chance for a cut-back.
64'
Pepe comes on for Almeida
60'
Yellow card to Denis Will Poha
59'
Bellerin looks to find Martinelli in behind down the right, but the Brazilian gets his timing wrong and the flag goes up.
56'
Tierney threatens with another low cross from the left, towards Lacazette this time, but Venancio is alert to the danger and hacks it away.
51'
Davidson is on the receiving end this time, meeting a cross from the right, but he heads the ball straight at Martinez. Bellerin might just have done enough to put him off, but Davidson might have done better with that.
47'
Nice footwork from Smith Rowe to get past his marker. He threads it through to Torreira who slips at the vital moment and the attack breaks down.
46'
Ceballos replaces Willock.
46'
Guendouzi replaces Maitland-Niles
45+1'
HALF-TIME: ARSENAL 1-2 VITORIA GUIMARAES
44'
Martinelli has now been directly involved in six goals in three starts for Arsenal in all competitions, scoring five and assisting one. He's probably been Arsenal's best on the night so far, but there haven't been a lot of contenders.
36'
GOAL! Vitoria lead again, Duarte scored the goal.
32'
GOAL! | Arsenal 1-1 Vitoria | Gabriel Martinelli 32'
Tierney loops in a lovely cross from the left and Martinelli meets it in a central position ten yards out, planting a header inside the left post.
27'
Davidson flicks a back-heel between Bellerin's legs - he won't want to see that one again - and then wins a free-kick as the right-back hauls him down. He's looked very tricky down the left so far tonight.
12'
Slow start from Arsenal and there's a huge hole in the midfield as Almeida comes forward, before seeing his shot blocked by Holding.
8'
GOAL! | Arsenal 0-1 Vitoria | Marcus Edwards 8'
The former Spurs youngster finishes superbly!
3'
Decent start from the visitors, who are looking to get the ball down and play it.
ARSENAL - Lineup
Tierney loops in a lovely cross from the left and Martinelli meets it in a central position ten yards out, planting a header inside the left post.
The former Spurs youngster finishes superbly!
Vitoria SC - Lineup