Paul Merson believes Unai Emery is working towards playing a three-man defence at Arsenal following the arrivals of David Luiz and Kieran Tierney.
Luiz was a surprise signing from Chelsea on deadline day, while the Gunners also strengthened their left-back by landing Tierney from Celtic in a £25 million deal.
Tierney is currently injured while Luiz was an unused substitute in Arsenal’s 1-0 victory over Newcastle United at St James’ Park on Sunday.
But Merson believes both players will eventually become a key part of Emery’s system at Arsenal.
‘When you’re looking at them and you’re naming them players, I wouldn’t be surprised if he started going to a three at the back,’ Merson said on Sky Sports’ ‘The Debate’ show.
‘Play them two and David Luiz in the middle of them.
‘He can come out and play, you’ve got Tierney playing as one wing-back.
‘I think it suits all of the defenders.
‘If you have three centre-halves playing there it gives all of them something to fall back on.
‘If Tierney can get forward he can play, so he’ll want to get forward.
‘They’ll want to bomb forward down the other side and they can score goals.
‘I’m looking forward to Arsenal this season. I was quite impressed [against Newcastle], I was quite impressed.
‘It was a hard game, going to Newcastle, first game of the season, a couple of new players.
‘For me it was comfortable and [Pierre-Emerick] Aubameyang what a goal, what a goal.’