Arsenal boss Mikel Arteta admits a late equaliser from Slavia Prague has left a 'different taste' to their Europa League quarter-final.
The Gunners looked to have avoided a dreaded away goal following Nicolas Pepe's 86th minute goal.
But Tomas Holes headed home three minutes into stoppage time to tie the game up.
"It's difficult because they were a good opponent," Arteta told BT Sport. "They have beaten some big teams and are really difficult to play against. They have a lot of man-to-man situations and you have to resolve them. When we did that, we created chances, but when you can't, it's not easy.
"We were effective in our high press - they had the capacity to run in transition if they won the ball back but we controlled that well. It's more about the final result that leaves a difficult taste."
The Spaniard added: "The game was under control. We got the goal we wanted but we missed some big chances as well.
"We played two or three balls we shouldn't do and we put ourselves on the back foot and conceded the corner. They put bodies in there and it can happen. It changes the feeling after the game."
The second leg will take place in Prague next Thursday.
