Romelu Lukaku marked his first appearance for Inter Milan with a four-goal haul in a pre-season friendly against Virtus Bergamo.
Lukaku joined Inter Milan in a £73m deal from Manchester United late in the transfer window.
And, on the same day that United hit four past Chelsea in their opening game of the 2019/20 Premier League season, Lukaku was among the goals for Inter.
The forward didn't play at all for United during pre-season but Inter head coach Antonio Conte handed him an opportunity against Serie D minnows Bergamo.
Lukaku, who has been handed the No 9 jersey at Inter, took advantage by scoring four times in an 8-0 victory.
Inter start their Serie A campaign against newly-promoted Lecce at the San Siro on August 26.
Elsewhere on Sunday, Paris-Saint Germain started their Ligue 1 campaign with a 3-0 victory over Nimes.
With Neymar not in the squad as he continues to be linked with a move away from PSG, it was Edinson Cavani, Kylian Mbappe and Angel Di Maria who scored for the champions.