Manchester United boss Louis van Gaal believes the outcome of the FA Cup quarter-final against Arsenal will not just affect the destiny of the venerable old trophy but also the contest for Champions League positions . The Gunners travel to Old Trafford on Monday to defend the trophy they won against Hull City last season with two sides also competing for a spot in the Premier League 's top-four . Van Gaal said : 'Arsenal and United are now in third and fourth place , so it is a big event with two good teams . I hope we can give a fantastic match for the fans . Manchester United boss Louis van Gaal believes the FA Cup-quarter final will affect the Premier League too . Ashley Young ( right ) scored the winner against Newcastle to see Manchester United fourth in the league . Van Gaal has praised Arsenal manager Arsene Wenger for his 'amazing ' work at the north London club . ' I think if we beat them it is a big blow for them , but if they beat us it is a big blow for us . It is very important game , not only for the FA Cup but also for the [ Premier League ] rat race . ' Van Gaal also paid tribute to the longevity of Gunners boss Arsene Wenger , who has been in charge of Arsenal since 1996 . He added : 'In my opinion what he has done is amazing . It can only be in England , I believe , where managers are so long committed with one club . 'It shows how much he can mean for a club as a manager . I like that - like Sir Alex Ferguson , Arsene Wenger - I think it 's fantastic that you can do that . ' Meanwhile , Marouane Fellaini admits United face a 'massive game ' against Arsenal if they are to end the season with a trophy . The Belgium midfielder , who was on the losing side at a Wembley FA Cup final with Everton , insists however that Louis van Gaal 's side can take confidence from their last-gap win over Newcastle in midweek . Marouane Fellaini ( left ) says United are in for a 'massive game ' against Arsenal in the FA Cup on Monday . Newcastle midfielder Jonas Gutierrez dribbles away from United 's Ander Herrera ( right ) Manchester United captain Wayne Rooney ( right ) flies in with a sliding challenge on Mike Williamson ( left ) He says United need to win at Old Trafford to avoid a tough replay at the Emirates . Fellaini told MUTV : 'It will be a challenge . Monday is a massive game . We have to win it in one game because playing at Arsenal would be difficult . The FA Cup is a special competition , a big trophy in England . I lost a final . I played in a semi-final . This season , I can win it . 'We have showed it spirit already a lot of times now and we have to continue like that . We have a big game on Monday , so it is good for the confidence . 'We always keep going and scored in the last minute [ against Newcastle ] . The spirit was good , we kept going and that is important . ' Striker Robin van Persie will miss the clash against his old club due to an ankle injury , and defender Jonny Evans will sit out after he was banned by the FA for six matches for spitting at Newcastle 's Papiss Cisse . Robin van Persie ( pictured here in February ) will be unavailable for the game against Arsenal . Manchester United defender Jonny Evans ( left ) has been suspended for spitting at Papiss Cisse ( right )
Manchester United will face Arsenal in the FA the FA Cup quarter-final . The two clubs are also competing for a top four finish in the Premier League . Louis van Gaal believes the the FA Cup game can influence league momentum . He has praised opposite number Arsene Wenger for his work at Arsenal . United defender Jonny Evans will miss the quarter-final through suspension .