The Wales international started Sunday’s north London derby on the bench as Emery preferred Lucas Torreira and Granit Xhaka in the middle of the park.
Emery turned to Ramsey at half-time after Eric Dier and Harry Kane cancelled out Pierre-Emerick Aubameyang’s opener in a frenetic first half in north London.
The former Cardiff midfielder made two assists for Aubameyang and fellow substitute Alexandre Lacazette to help Arsenal reclaim the lead before Torreira’s late goal.
Ramsey has found his first-team opportunities limited in recent weeks despite having been a regular in the opening weeks under the new Gunners boss.
However, the 27-year-old is set to leave Arsenal at the end of the season on a free transfer after the Gunners withdrew their contract offer.
The versatile midfielder will be out of contract in the summer unless Arsenal have a change of heart or decide to sell the Welshman in the January transfer window.
While other players have allowed their performances to dip during contract drama at Arsenal in recent seasons, Ramsey has remained professional and has continued to perform on the pitch.
Speaking at his post-match media conference about Ramsey, Emery said:
“I was thinking first about the first XI, then I was looking at the decisions, choosing the first XI with different possibilities.
“Aaron has chances to help us, either by starting the match or when the match is in the second half to play minutes.
“Above all today can be his day. Because it’s against Tottenham and he has experience of matches like today. We are continuing with him in our process, helping him to be with us with his performances, with his qualities and his experience here.”
Ramsey has scored two goals and has made six assists in all competitions this term.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news