Kyle Edmund and his coach are facing an unprecedented problem with their national allegiances.
The 23-year-old arrived at Wimbledon practice courts on Wednesday wearing an England football shirt, having cheered on the home-side during their penalty shoot-out victory over Colombia.
However, his Swedish coach Fredrik Rosengren turned up in his own national team's kit, prompting Edmund to tweet a photo of them jokingly sparring.
He wrote: "When your coach is a Swede and you tell him it's coming home... let's go @England!"
England face Sweden in the World Cup quarter-final on Saturday.
But both men may miss out on watching the match, with Edmund scheduled for a third-round match on Saturday if he wins his match on Thursday.