Former Gunners midfielder Gilberto Silva says Alexis Sanchez is a nightmare for defenders and it's a big plus for Wenger's side.
Arsenal beat QPR 2-1 at Loftus Road on Wednesday night, maintaining the north London club's position in third place.
Olivier Giroud broke the deadlock in the 64th minute and former Barcelona attacker Alexis Sanchez increased the deficit five minutes later.
Charlie Austin scored in the 82nd minute for the R's but it wasn’t enough to secure a comeback on the night.
However, Gilberto who won a Premier League title and two FA Cups with Arsenal hailed Sanchez's impact at the club since his arrival from Barcelona.
“I’m impressed with Alexis,” Gilberto said. “He has settled really well and I am very happy to see a player like him at a club like Arsenal.
“It was important for him and the team to start his time with the club well and I really like his style. Arsène Wenger and the club are very careful when they want to sign a player, they don’t want to make a mistake.
“But I think they did the right thing with Alexis and he is paying them back with his performances. He is doing well and I hope he continues like that because he can be a guy who can help Arsenal win titles, that is what the club wants,” he continued.
Gilberto also compared the Chilean to Barcelona forward Neymar, both players are set to face each other when Brazil play Chile at the Emirates Stadium on the 29th of March.
“Alexis can be a killer in front of the goal and a nightmare for defenders but Neymar is also doing really well, he is very skilful and can make a difference with every single attack,” he said.
“It is really good when you have a game where both sides have these great players that go against each other, they are very attractive and can produce the football people want to watch.”