Hugo Viana is facing a lengthy spell on the sidelines after breaking a metatarsal in his right foot in training with his new club Osasuna.
But Barton is out for an estimated six weeks, Hugo is "no-go" for 12 weeks.
1999/2003 D.A.Z.Gavilan 2/6 1
Diego Antonio Gavilan Zarate came from Paraguay and became the first player from his country to play in the Premiership.
Cost £1m from Cerro Porteno but was never been as good as his reputation. Was supposed to be the best youngster in South American football. We've heard that one before.
Moved to Mexico on loan in December 2001, then stayed there in 2003. Played in the 2002 World Cup.