Jadon Sancho has sent a message to Manchester United amid his ongoing transfer saga, insisting that he's happy at Borussia Dortmund and that he loves playing with his youthful team-mates.

Borussia Dortmund managing director Hans-Joachim Watzke says the club want to sign Jude Bellingham, but admits competition to sign the 16-year-old prodigy will be fierce.

Another European club season is right around the corner. So which U.S. men's national team players have the most to prove?