The Belgium global was a half-time substitute in his country's 3-3 draw with Mexico and played the whole of the second half at the Roi Baudouin Stadium.
They are two places and four points above Arsenal in the current campaign too, a gap which could be extended to seven points when the two sides meet this weekend.
"My injury is much better", Dembele told Sky Sports.
And he played the full 45 minutes after coming on at half time in the 1-0 win over Crystal Palace earlier this month. Of course, I want to be playing for the team and adding my value but right now I am very optimistic and feel good.
He returned with a cameo appearance at Manchester United at the end of October before replacing the injured Harry Winks at half time in the narrow win over Crystal Palace before the worldwide break.
While winning the Premier League this season will certainly be a very hard task for Tottenham Hotspur given the excellent form of Manchester City, Mauricio Pochettino's side can at least claim to be the dominant side in North London at present.
For the first time in many years, Spurs finished above the Gunners last season and as a result, Parlour says they have to go down as the better team for the time being. Toby Alderweireld has a hamstring issue and Michel Vorm is also out injured. Aided by the non-stop scoring of Harry Kane - a player who has scored in every league match he's played against Arsenal - and the fact Mauricio Pochettino has fashioned a well-organised, hard to break down team, it's now over three years since an Arsene Wenger side has tasted league victory in the derby.