Arsenal will be without Gabriel for three weeks after the central defender sustained a hamstring injury . The January signing limped off during Wednesday 's win at Queens Park Rangers that kept Arsenal third in the Barclays Premier League . He will miss Monday 's FA Cup clash against Manchester United , the league game against West Ham and Champions League tie versus Monaco . Wenger confirmed he will be without Gabriel Paulista for up to three weeks due to a hamstring injury . The January signing limped off during Wednesday 's win over Queens Park Rangers at Loftus Road . Arsenal manager Arsene Wenger held a press conference on Friday morning ahead of his FA Cup match . 'Gabriel has a little hamstring injury and he will be out for two to three weeks , ' Wenger said . 'That means he ’ s not available for the weekend and certainly not for West Ham United or Monaco , but after that he should be available again . 'We will of course lose Gabriel in the squad and Nacho Monreal might come back . He will have a test today . Everybody else should be available - the same squad that played against Queens Park Rangers . ' Wenger added goalkeeper Wojciech Szczesny will also go through a test on Friday and that 'if he gets through that then he will play on Monday night ' . 'Wojciech is used to playing in big games and I think he ’ ll take that as a big challenge to show his quality . He works very hard in training - I don ’ t think that will be a problem , ' he said .
Arsenal beat QPR 2-1 on Wednesday to stay third in the Premier League . Arsene Wenger 's men face Manchester United in Cup on Monday . Gabriel was injured during Arsenal 's win at Loftus Road on Wednesday . READ : Paulista transfer was down to his exceptional stats , says Wenger . READ : Arsenal new recruits Ospina and Paulista continue to impress . CLICK HERE for all the latest Arsenal news .