Manchester United v Arsenal: manager Arsène Wenger urges fans not to abuse former captain Robin van Persie Wenger, though, maintained Arsenal must not worry about just trying to put one over their former captain tomorrow. He added: "For us, what is important is the result at the end of the game, and the quality of our performance. We do not even talk about him. Van Persie netted a total of 132 Arsenal goals - 37 of which came last season to help secure third place in the Premier League. The Holland forward, 29, has certainly come a long way since Wenger brought him to the club as a raw, temperamental talent from Feyenoord in 2004. Much of that is down to the guidance of the Arsenal manager. You would think that one of the parts of my job is to have a positive influence on people's (lives) as a player. When you manage to do that, you are always kind of satisfied," said Wenger. You want to try and have a positive influence on people you cross in your life. I think my influence was not too bad. Van Persie, who turned down a lucrative offer from champions Manchester City, has settled quickly into his new side, scoring seven Premier League goals already. Wenger said: "I am not surprised by how well he is doing. In Manchester United, you have good players around him, and Robin is very intelligent around the box, his runs are fantastic and his technique is absolutely amazing. There are a lot of players in offensive positions, so with his intelligent runs, of course he will take advantage of that. Robin is certainly the most efficient striker. Arsenal head to Schalke for a Champions League tie on Tuesday night, so Wenger will take that into consideration ahead of tomorrow's trip back to the stadium in which they were thumped 8-2 last August. Winger Gervinho is expected to be out for around three weeks with an ankle problem, while goalkeeper Wojciech Szczesny, fullback Kieran Gibbs and midfielder Abou Diaby remain unavailable. England forward Theo Walcott netted a hat-trick in the amazing Capital One Cup comeback at Reading in midweek, but after completing the whole of extra-time may be on the bench again. "I will see how he recovers," said Wenger, who is ever hopeful a new contract can be agreed with Walcott. We play again in Schalke on Tuesday, so I will consider the global situation - some players will be available maybe more for Tuesday than Saturday.