The striker has been a useful addition for the Red Devils since signing in the January transfer window, registering four goals in all competitions and providing able support for Ole Gunnar Solskjær’s forward line.
However, the Nigerian’s loan from Shanghai Shenhua is set to end in May, and the Chinese Super League club are reportedly keen to offer him a new deal.
Sule, however, suggested in an interview with Goal that his compatriot’s future could instead lie at one of several European destinations outside of Old Trafford.
“I see Odion Ighalo earning a big-money move from top European teams when his loan expires at Manchester United,” said Sule.
“I don’t think Man United are keen on retaining him because they seem not to value him enough to hand him a regular place,” the former striker went on to explain.
“He also may not be wanted again when Marcus Rashford is fit.
“I will not advise him to return to China now despite the attractive offer but would urge him to stay in Europe. I won’t be surprised if Chelsea, Manchester City, Real Madrid or Barcelona come for him.
Sule also praised the impact that the boyhood Manchester United fan has made in a short space of time at his new club.
“He has proven that he’s got a lot to offer at the highest level within his short stay at Man United,” he added.
“[Now] he can attract big brands and earn more money, playing in any of the top teams in England.
“He can always still return to China later in his career but right now, I think he has what it takes to shine in Europe.”