The France international was hit and miss at Newcastle United, but he has had a positive impact in Tottenham Hotspur's last few games.
With Tottenham still missing Erik Lamela, Sissoko has started two of the last three matches on the right wing, which has seen the North London side go on a mini-run of successive victories that has kept them in check with a top four who are maintaining their own decent form.
Tottenham's Moussa Sissoko in action with Burnley's Ben Mee
With Manchester City set to face Liverpool on December 31, something has to give, and Spurs would edge closer to at least one of the sides above them if they were to extend their winning run against Watford.
The Frenchman has been preferred to Heung-Min Son in the starting lineup during these games either side of Christmas, with Pochettino returning to a formation that sees Christian Eriksen on the left side of midfield and Dele All playing the central attacking midfield role.
In each match, the 27-year-old has been able to give a performance much more in line with the player Tottenham hoped to be getting when they paid big money after an impressive Euro 2016. Crucially, Eriksen and All have also been in superb form.
Manchester United's Matteo Darmian in action with Tottenham's Moussa Sissoko
There is certainly still room for improvement, but Sissoko has been able to showcase his powerful runs from the middle of the pitch, resulting in goals against both Burnley and Southampton. Both times he slipped through superb passes to a supporting runner having broken through the defensive banks.
Pochettino will have a big decision to make for the short trip to Vicarage Road on New Year's Day, with Son doing his own cause no harm at all with a super finish after coming off the bench against Southampton. The South Korean star will also be returning to a ground where he was the match winner last season, scoring a superb brace in a similarly festive fixture.
But with Spurs likely to find themselves up against another powerful, defensively minded opponent, the Argentine could well plump for his improving summer signing. And who would bet on another gut-busting run from deep to make the difference?