Keenan Ferguson, who can play at right-back or centre-back, was named in the U23’s side which were held to a 1-1 draw by Brighton and Hove Albion in their opening Premier League 2 game of the season.
The 20-year-old had been on trial with the development squad after leaving Sheffield United earlier in the summer and appears to have done enough to earn a permanent contract.
Ferguson is not expected to be the final addition at Spurs before the transfer window closes next month.
Head coach Jose Mourinho has outlined his wish for a new striker following deals for Pierre-Emile Højbjerg, Joe Hart and Matt Doherty.
“Yes, I want, I need a striker, but I want to make it very, very clear that the club – the structure above me – knows that I need a striker and also wants a striker,” he said in his pre-Everton press conference.
“Are we going to get one? I honestly believe so. For the balance of the squad, the team needs it because in this moment the squad is getting very balanced, with different options for different positions.
“Especially after the gift we had from the EFL and UEFA, that gives me after 20 years of football a unique experience of playing Sunday, Tuesday, Thursday, Sunday for two consecutive weeks.
“We realise that more than ever we need that.
“So, yes, we’re working on it.
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“The other day Jurgen was saying that Liverpool is not a club of oligarchs and that belongs to countries.
“We are the same. We cannot go to the market and spend a fortune on players.
“But we all – we all, I want to make that clear – are working hard to give good balance to the squad and that good balance would to get one more striker to the team.”