Louis Tomlinson has threatened to target bandmate Niall Horan's injured knee in Sunday's (05Jun16) Soccer Aid charity game.
Niall is set to lace up his boots to play for the Rest of the World celebrity soccer team against the English side at Old Trafford stadium in Manchester, England.
However his bandmate Louis, who is in the England line-up, says the 22-year-old singer will have to play through the pain due to an old knee injury.
"He has got a bit of a twinge so he'll be walking off injured on Sunday," Louis tells British newspaper The Sun. "Don't tell the insurers!"
Niall had major knee surgery in 2014, and was initially billed as a non-playing assistant manager in the sporting contest, which is raising money for the United Nations' children's charity Unicef.
However he tells Britain's Daily Mail newspaper that he plans to play for "15 or 20 minutes" against Louis and the England side.
The Steal My Girl singer explained that Louis, 24, whose love of football has seen him play for his hometown Doncaster Rovers in non-competitive matches, had threatened to target the knee when tackling him.
"At some stage, knowing Louis plays, we will bump into each other, so he said he's going to go for my knee," he divulged. "He said 'watch that knee', so I will. I will be staying away from anyone who goes near me for a tackle."
The match, which sees a number of soccer legends including Brazilian star Ronaldinho and former Liverpool F.C. star Jamie Carragher team up with famous names to raise money, has been hit by a number of stars suffering injury problems.
Earlier this week Scottish celebrity chef Gordon Ramsay had to pull out of the game after rupturing his Achilles tendon, while McFly musician Danny Jones was rushed to hospital for an X-ray after injuring his elbow in training. Welsh actor Michael Sheen, who is set to captain the Rest of the World side has also reportedly suffered a broken toe in the run-up to the game.
One person who Niall believes is in incredible shape for the game however is British singer and TV presenter Olly Murs.
"You look at Olly Murs who had been training non-stop for six months and he's in unbelievable shape, so I wish I had done a bit more," he admitted.
The 2016 Soccer Aid match, will kick-off at Old Trafford stadium at 8pm local time on Sunday.