Cesc Fabregas made an immediate impact on his Chelsea debut, providing an assist against OL Ljubjana.
The Spaniard appeared thrilled to set up fellow new-boy Diego Costa for the equaliser in the 2-1 win, and the picture is not one which will be easily digested by fans of his former club.
The prospect of Fabregas wearing Chelsea colours appeared inconceivable ahead of this summer, and did so even when the transfer rumours began.
It had long been suspected that the side he once captained, Arsenal, would elect to buy him back, but they chose to pass on a deal.
That does not make the sight of a short-shaven Cesc grinning broadly in Chelsea colours any easier to look at.
Signed for a fee in the region of £30 million, the midfield addition from Barcelona could turn out to be a potential bargain, and appears to have had no problem instantly adapting to life with his new club.
Chelsea fans will hope Fabregas' promise that he wants to win 'absolutely everything' for the club comes true, while Gooners will be for the first time, wishing that he fails miserably.