Manchester United snapped up a young Anthony Martial from Monaco in 2015, parting with a huge £36million upfront, with an additional £21.6m in variable bonuses.
There were three variable bonus clauses in total that, at the time, former Monaco vice-president Vadim Vasilyev was confident would all be triggered.
"The price for Martial is £57.6million," said Vasilyev in 2015. "But take into account this sum includes bonuses, which are very realistic."
