Victory:Arsenal came from behind to beat Liverpool 2-1ARSENE Wenger promised to do "everything possible” to keep Robin van Persie at Arsenal after the Netherlands striker struck a double blow to Liverpool’s Champions League hopes.Van Persie scored twice - including a brilliant stoppage time winner - as Arsenal came from behind for the third successive league game to defeat Liverpool 2-1 at Anfield.The Gunners captain now has 31 goals in all competitions but speculation continues about his future with the London club.Van Persie has just over a year left on his contract but has so far delayed talks about extending his stay.But Wenger insists Arsenal will do what they can to ensure their lethal marksman stays."We will do everything possible to keep him,” said Wenger after the Dutchman inspired Arsenal’s fourth-straight league win."I can’t say much more than that."He’s up there with the best players in the world. I’m very proud of him. He was very timid when he first arrived at the club and to see how far he has come is very pleasing.”Arsenal face mission impossible tomorrow when they attempt to overturn a 4-0 first leg deficit against AC Milan in the last 16 of the Champions League.But Wenger will think anything is possible with Van Persie in the team.His volleyed winner at Anfield was pure quality and left Liverpool manager Kenny Dalglish singing his praises."He is a terrific player,” said Dalglish after Liverpool fell 10 points behind fourth-placed Arsenal with 12 games remaining.Meanwhile, Wenger is facing problems ahead of AC Milan’s visit to the Emirates.Midfielder Mikel Arteta went to hospital after being carried off on a stretcher after colliding with Jordan Henderson.Abou Diaby and Yossi Benayoun also suffered hamstring injuries and are serious doubts for Tuesday.