DC: Javier Mascherano (Liverpool to Barcelona)
Not a centre-back at Liverpool, but Javier Mascherano has gone on to become a key player in that position for Barcelona, winning the treble last season.
DC: Thomas Vermaelen (Arsenal to Barcelona)
Offloaded due to injury problems, former Arsenal captain Thomas Vermaelen is one of many players to leave the Emirates Stadium for the Nou Camp in recent times.
MC: Alex Song (Arsenal to Barcelona)
A bizarre move, Alex Song was not a particularly amazing performer for Arsenal, but showed some fine form in 2011/12 that saw Barca snap him up.
MC: Cesc Fabregas (Arsenal to Barcelona)
A huge blow from the summer of 2011, Cesc Fabregas is one of two former Arsenal captains in this XI that ended up moving to Barcelona. Even worse for the Gunners, he’s now back in the Premier League with Chelsea.
