Arsenal will be due a windfall if Barcelona win the Champions League.
Sport says the Gunners will be set for a £2.8million windfall if Barcelona win the Champions League.
The Belgian defender hasn't played for his new side this season due to injury problems.
But he could end up costing Barca almost £3m more than they bargained for if the Spanish giants triumph against Juventus in the Champions League final in Berlin.
Winning the Champions League is said to trigger one of the bonuses included in Vermaelen's transfer, meaning the Gunners would pocket an extra £2.8m.