1 Arsenal welcome giant-killers Middlesbrough to the Emirates on Sunday, in their FA Cup Fifth Round encounter. Arsenal welcome giant-killers Middlesbrough to the Emirates on Sunday, in their FA Cup Fifth Round encounter, live on talkSPORT, from 3.30pm.The holders beat Brighton 3-2 in the previous round, while ‘Boro dumped Premier League champions Manchester City out with a memorable 2-0 victory at the Etihad.Gabriel Paulista is in line for his Gunners’ debut, while boss Arsene Wenger confirmed Polish keeper Wojciech Szczesny will return between the sticks.However, midfielder Aaron Ramsey will be out for two weeks – the Welshman limped off in Tuesday’s win over Leicester – with a hamstring injury, while Alex Oxlade-Chamberlain, Mikel Arteta and Mathieu Debuchy remain on the sidelines.Will Gabriel make his first start and will Alexis be fully fit? talkSPORT takes a look…Possible Arsenal line-up against Middlesbrough:GoalkeeperSzczesny will return between the sticks as the Gunners’ cup goalkeeper.The Polish international has lost his place to David Ospina in recent weeks, after being disciplined for smoking in the showers following his side’s defeat at Southampton, but a solid performance could boost his claim for a regular place.DefenceGabriel moved the Emirates for £11m in the January transfer window and Wenger has hinted the Brazilian could make his debut.Kieran Gibbs has spoke of his frustration at missing out recently following injury, but the Englishman should come into the starting XI and will keen to prove his worth.MidfieldA central factor in Arsenal’s good recent run has been the introduction of Francois Coquelin, who has added strength and protection to the Gunners’ back four.With Ramsey out, Tomas Rosicky should step into the central midfield role, and the Czech starred against Brighton in the previous round.Santi Cazorla’s performances have dropped slightly in the past couple matches, and Wenger may see fit to rest to the Spaniard, with the rejuvenated Mesut Ozil operating in the no.10 role.AttackIf Alexis is fit, Danny Welbeck could come in for Olivier Giroud, who has under performed recently.But it is difficult to see the Chilean start after picking up another knock midweek, and that should see him start from the bench, with Theo Walcott and Welbeck either side of Giroud.Arsenal fans, how do you think you’ll line-up against Middlesbrough? Comment below…Arsenal v Middlesbrough is live on talkSPORT, Sunday from 3.30pm. Click here to stream.