Arsenal host Leyton Orient in their FA Cup replay tonight and Gavin Beech has a goalscorer tip from the Emirates…

Robin van Persie will miss Arsenal’s crucial Champions League clash against Barcelona next Tuesday after being ruled out for at least three weeks with a knee injury.

Van Persie, who was injured whilst scoring for Arsenal in their 2-1 defeat in the Carling Cup final on Sunday, had been in prolific form since the turn of the year, scoring 11 times in his last 13 games.

Manager Arsene Wenger said: “Unfortunately, we had bad news on the scan and he will be out for the next three weeks for sure. It could be longer. The shortest delay we can imagine is three weeks [so] he is definitely out for Barcelona.”

The striker’s absence is a major blow to Wenger, who is also without long-term absentees Thomas Vermaelen and Lukasz Fabianski and has said Theo Walcott has little chance of appearing in the game.

However, Wenger described Cesc Fabregas as a “possible” for the Nou Camp trip after confirming he is making progress in recovering from a hamstring problem.

Wenger also had better news about Cameroon international Alex Song.

“Song has a knee problem as well. From his scan we had good news, it is only blood from a kick on the outside of his knee. He has a good chance for Barcelona,” Wenger told the club’s official website.

Defender Laurent Koscielny, who is nursing a minor hamstring problem, will be fit for the trip to Spain but will be rested for Wednesday’s FA Cup fifth-round replay against Leyton Orient.

Manuel Almunia will start in goal against the League One side with Wojciech Szczesny on the bench and midfielder Abou Diaby is expected to play.

“Koscielny has a tight hamstring,” Wenger said. “There is a little bit of fatigue in there as well so we will give him a breather. Almunia needs games so he will play, but Wojciech is all right and will be on the bench.

“Diaby was not in the squad on Sunday. I was cautious with him. He has missed many games this season and I did not want to take a gamble with the intensity of a cup final. He will play tomorrow night.”

Arsenal host Leyton Orient in their FA Cup replay tonight and Gavin Beech has a goalscorer tip from the Emirates…

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