Off came the mask, and suddenly Cesc Fabregas was back in an Arsenal shirt again.
This was not how Gooners had envisioned his return to The Emirates.
Fabregas was not cheered by the crowd, instead he was the subject of criticism and choice words from fans, as he helped Chelsea move within six points of the Premier League title.
The midfielder swapped shirts after the game with German international Mesut Ozil, and draped the shirt around his shoulders, proving old habits die hard.
A wistful look from Olivier Giroud in his direction (above) summed up the feelings of sadness that the Spanish international was not back playing for the side he once captained.
Fabregas is now in line to win his first ever league title in England, while his manager Jose Mourinho has now gone 13 games undefeated against Arsene Wenger.
The midfielder angered the Arsenal crowd in the first half with a penalty appeal, for which he was judged by the referee to have dived.