Arsenal left-back Andre Santos has travelled to Brazil to finalise details on a loan move to Gremio until end of season.

Santos has made 13 league starts since arriving from Turkish side Fenerbahce in a £6.2m move in August 2011 .

His imminent exit has restricted Arsene Wenger's left-back options as Kieran Gibbs has been ruled out for another four to six weeks.

Recent signing Nacho Monreal, 26, is cup-tied for the Champions League.

Andre Santos at Arsenal

Premier League starts: 13

Goals (all competitions): 3

Premier League minutes this season: 415

However, Thomas Vermaelen, who missed Saturday's 1-0 win at Sunderland with an ankle problem, is close returning and can play at left-back.

And another option is 20-year-old Spaniard Ignasi Miquel, who has made just one league start  for Arsenal.

Brazil international Santos has struggled to adapt to the Premier League and upset Arsenal fans when he took the bizarre decision  to ask former Gunners striker Robin van Persie to swap shirts at half-time during the 2-1 defeat at Manchester United on 3 November.

Santos has fallen further down the pecking order since Monreal's £8.5m arrival from Malaga at the end of January and is surplus to requirements, despite the absence of Gibbs and Vermaelen.

Monreal will not be able to play in Arsenal's Champions League round of 16 tie with Bayern Munich later this month after representing Malaga in this season's competition.