Arsenal manager Arsene Wenger has described his side's finish to the 3-2 win over Swansea city at the Emirates stadium on Saturday as an uncomfortable one.
The Gunners led 2-1 in the first half with two goals from Theo Walcott and one from Sigurdsson for Swansea.
After the break, Ozil increased Arsenal's lead in the 57th minute before González Tomás made it 3-2 in the 66th minute.
Granit Xhaka was sent off in the 70th minute to make things difficult for them in the end.
Speaking on the game, Wenger said, arsenal.com reports: "Yes, what looked to become a comfortable afternoon finished in a very uncomfortable way.
"But we just got over the line. I thought we played some fantastic football in patches but at 2-0 maybe we lost our focus a bit.
"After that, at 3-1, [it happened] again. When we were down to 10 men at 3-2, we could have scored the fourth goal but we could have conceded as well. In the end we just got over the line. We playedtogether, with spirit until the end. It was difficultat the end."