The Spanish midfielder played the full 90 minutes and was named man of the match as Guus Hiddink's side secured a battling win in north London thanks to Diego Costa's first-half goal at Emirates Stadium.
And the playmaker looked to be in good spirits as he met Lebanese fashion designer Elie Saab with his partner on Monday.
Fabregas' partner Daniella Semaan posted the picture above on her personal Instagram account and wrote: "When Fashion meets sports 😉#PFW @eliesaabworld @cescf4bregas"