Thomas Frank’s Tottenham future is in the balance, talkSPORT understands.Frank believes he retains the backing of the Spurs hierarchy despite once again being jeered by supporters following Saturday’s disastrous London derby defeat at home to West Ham.Frank is on the brink after his side lost 2-1 to West HamGettySpurs went into the winter transfer market backing Frank and have involved him heavily in January recruitment.He is believed to have also driven the appointment of assistant John Heitinga.Yet the mood has changed over the past few weeks and the club are now set to assess whether a change is needed.Sources have told talkSPORT that boardroom discussions are taking place as to whether Frank’s position is becoming untenable.Chief executive Vinai Venkatesham is believed to be central to the final decision.Tottenham have won only seven of his 22 Premier League games in charge.Pochettino to return?If Frank is sacked, Spurs would likely appoint an interim manager until the end of the season.It is understood former boss Mauricio Pochettino would be open to a return to the club after leading the USA at this summer’s World Cup.Pochettino left Tottenham in 2019 following five years in north London, during which he reached a Champions League final. He then went on to become PSG manager before returning to the Premier League as Chelsea boss from 2023 to 2024. Pochettino is open to making a return to Tottenham if Frank is sackedGettyThe Spurs board are going to assess Frank’s future at the clubGettyAfter leaving Chelsea, the Argentine took to the international stage, being announced as the new USA manager. He has taken charge of 22 games in his role with the United States, winning 14 and losing seven.Pochettino’s longest stint on the touchline for a club was with Tottenham, where he managed 293 games. He won 160 of those, drawing and losing 73 across five years, running very close to winning the Premier League title in 2016.What has Frank said on his future? Frank is now on the brink at Tottenham, just seven months into the job after leaving Brentford last summer.He was asked post-match on Saturday about his future and hearing chants of ‘You’re getting sacked in the morning’ from Spurs fans.Tottenham are sitting 14th in the Premier League after 22 gamesThe Dane replied: “Of course, I’ve probably had better times, it’s probably not the best time, of course.“But I understand, I’m the man in charge. So the blame will go to me. That’s fair, no problem in that sense.“As long as they are backing the players, doing everything they can, to support them and drive them forward, that’s what we do, and we will keep going forward.”He added: “If you’re not winning enough, we know you will not get enough support from the fans.“But when we’re winning, it will change, when we start winning again. Which we will do. I’m not in doubt of that.”