Monaco have completed the £35m signing of striker Folarin Balogun from Arsenal on a five-year deal.
The 22-year-old United States forward returns to France after scoring 22 goals on loan at Reims last season.
Balogun had not featured for Arsenal in the Premier League at the start of this season despite first-choice striker Gabriel Jesus being out injured.
He signed professional terms with Arsenal at 17 and made two top-flight appearances in his time with the club.
In Jesus' absence, Eddie Nketiah started the first two matches of the campaign, while Leandro Trossard was favoured in Saturday's 2-2 draw with Fulham.