Onomah was all set to go on tour of America with Spurs over pre-season, so he could show Pochettino just how much he had progressed on loan with Aston Villa.
However, the midfielder was ruled out with injury, which means he was forced to stay at home.
That has left Onomah’s chances of staying at Tottenham looking slim, and when pushed on the future of the midfielder, along with Harry Winks and Erik Lamela, Pochettino said: "Maybe someone yes, maybe some no.
“Of course they’re all in different situations. Still one training session tomorrow and then to make the decision. But happy because Erik Lamela is back again, Josh Onomah and Harry Winks. We’re a bit disappointed about Josh because he was injured in the summer and could not play one game and train with the first team through the whole pre-season.
“He’s a little bit behind the rest but we’re working and I’m going to decide if he’s a player that can stay with us or maybe if we believe he can play more, to find maybe some alternative for him to play more than last season. But to try for him to be more involved than he was last season at Aston Villa.”
Onomah was rotated in and out of Villa’s starting line-up last term, meaning he didn’t play as regularly as Spurs were hoping.
The midfielder just couldn’t hold down a place in Steve Bruce’s side, as Villa unsuccessfully attempted to get promotion.
Onomah’s chances of breaking back into Tottenham’s team look slim, as Pochettino has so many options in attacking midfielder.
In Onomah’s absence, Luke Amos has moved up in Spurs’ pecking order, after an impressive pre-season.