Ademola Lookman struck the winner on his debut three days after leaving Everton on loan as RB Leipzig won at Borussia Moenchengladbach.
The 20-year-old moved on deadline day despite Everton manager Sam Allardyce urging him to move on loan in England.
After being on the pitch 11 minutes, Lookman drove into the bottom corner for an 89th-minute winner.
He becomes the first Englishman to score in the Bundesliga since Owen Hargreaves at Bayern Munich in 2005.
Allardyce said Lookman’s move to Leipzig was “one of the most unusual situations I’ve been in”, adding the deal was a “big challenge” for the player’s development.
The former England manager said he hoped Lookman “proves us all wrong” and in finding the net on debut, his goal delivered Leipzig’s first win in three matches, moving them third in the table.
England Under-21 international Lookman joined the Toffees from Charlton for £11m in January 2017 and has made seven Premier League appearances this season, starting one game.
Source: BBC Sport