On the game:
"To beat Watford you have to be completely committed to the game because we faced a team that was well organised and knew exactly what they wanted to do.
"They were very physical in the challenge and very strong in the challenges and very direct. These three things together, it took us a while to get on top of that.
"In the second half, the fatigue coming in, Watford came in less in the challenges and we got the ball quicker in transition and were much more dangerous.
"When we scored the first goal, I like the fact we continued to attack and got a convincing win."
On Sanchez:
"I was. Yesterday in the training session he looked quite sharp and the medical people told me he has no problem at all then I thought I would test if he is ready and if he was not ready I would take him out," said Wenger.
"But sometimes it is easier to start the game and take the players off than when you go into the game a little bit tired because you go with the game so I decided to go for that."
"Every player hates not playing, but as well you have periods as a player when you are on a scoring moment then sometimes the flow can be disturbed. That is why I leave him in."
On Bayern:
"Obviously there is no obvious reason to change completely the team. Maybe one or two I do not know yet. We will have to see how everybody recovers.
"I could rest a little bit Ozil and Sanchez and we have of course to put pace into this game and play against a big team.
"We know we have proved ourselves in the Champions League and we want to make something special against Bayern Munich as it is the only way we can keep in the race for qualification.