Danny Welbeck joins Arsenal: Rio Ferdinand says the striker will 'flourish and explode' at Arsenal
The England international signed on deadline day for £16m
Ferdinand, who played alongside Welbeck for United, says Arsene Wenger's £16m deadline day purchase is a "top signing".
The 23-year-old, who is currently on international duty with England, and trained with the centre-back Ferdinand for six seasons. Ferdinand himself left United this summer, signing for Queens Park Rangers on a free transfer.
"Welbeck is a top signing for Arsenal," Ferdinand said. "If he gets that trust to be No 1 striker at AFC he will flourish and explode."
Read more: Welbeck part of growing British core at Arsenal
Welbeck move has 'broken' United's identity - Phelan
Welbeck was United through-and-through
Welbeck scored 29 goals in 142 appearances in all competitions for United, and won the Premier League title with the club in 2013.
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