Usain Bolt's transition into football has not been without its critics.
Sure, the 32-year-old Jamaican made his debut for Central Coast Mariners in August and followed it up by bagging himself a brace in October, but there have been many people questioning whether he has what it takes to make it in the sport.
However, the former sprinter has now taken to Instagram to silence his critics once and for all.
"They say Bolt [is] wasting his time," he wrote. "They laugh at the dream... They ridicule the hard work...
"Listen [to] me, youths... Every country Yute [sic], Every ghetto Yute [sic], work hard at your dream and let not [a] single soul tell you that can't achieve...
"Remember: if you don't try, you've already failed... My team keeps doing the damn thing."
Former Liverpool and Bayern Munich player Markus Babbel launched a scathing attack on his attempt to break into football. More recently, though, former Republic of Ireland striker Andy Keogh said he has a "touch like a trampoline."
He added: "He's not going to be able to make it.
"It's nice to have the attention on the A-League but him playing here, that's not for me.
"He's shown a bit of potential but it's a little bit of a kick in the teeth to the professionals that are in the league."
Will Lightning Bolt be a hit for Central Coast?
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Featured Image Credit: PA