"He suffered a small incident in the same leg, but we are going to assess him".
Pochettino added that he believed the problem was affecting a "different area" on the same leg as that previous injury and insisted he was "not involved in negotiations" regarding Alderweireld's contract amid renewed reports from the Manchester Evening News that Manchester United are prepared to take advantage of such a standoff and bid for his services in the summer.
"We hope it is not a big issue".
The 28-year-old's current deal expires in 2019, though Tottenham do have the option of extending that by a further 12 months.
Toby Alderweireld is reportedly asking for his wage to be increased to £150,000 per week but Tottenham are unwilling to play ball due to their strict wage structure.
Pochettino remained tight-lipped on the subject when asked about it at his press conference on Friday.
He said: 'Only I can talk about him because I know him very well. I never talk about rumours, what the media say or what happens around the club.
"It is not my job and I can not say anything about that", Pochettino said when asked about Alderweireld's future on Friday.
"And for me he is this type of player, I think I told you in my book, I put him next to Ronaldinho, Maradona, Okocha - players that I was lucky to play with. For him it was always hard to be fit - he's always fighting for his fitness - but now he's in an incredible moment and he deserves all the praise people are giving him". "We will assess him today and tomorrow".
Tottenham have a gruelling schedule in the coming weeks, with games in the league, the FA Cup and in Europe, but Pochettino is confident his squad can cope. "Nearly all the players are fit to compete and available to be selected".