Toby Alderweireld has been relatively quiet in public regarding his future at Tottenham Hotspur.Questions have been raised over his long-term position at the club due to the fact that he is yet to sign a new contract.According to a recent report in the London Evening Standard, Spurs are willing to sell the defender, who has been at the club since his 2015 switch from Atletico Madrid and is valued by Transfermarkt at £36million.The publication adds that Alderweireld is likely to be left out of Mauricio Pochettino's starting XI for this weekend's FA Cup semi-final against Manchester United.https://video.footballfancast.com/video-2015/harry-kane-100.mp4In fact, the centre-back has played just once since February when he recovered from a hamstring injury that kept him on the sidelines for around three months.Tottenham fans regularly discuss the situation on social media, and now one supporter thinks that he has insider information.Twitter user @Arif_THFC claimed on Wednesday that when he bumped into Alderweireld, the Belgian admitted that he was unsure about his future.