Chelsea are maintaining a watching brief on Anderlecht teenagers Youri Tielemans and Leander Dendoncker . Tielemans , 17 , has been watched by Manchester United and Arsenal also and is a centre midfielder of some promise . He became the youngest Belgian player to play in the UEFA Champions League , making his Champions League debut at the age of 16 years , four months and 25 days in 2013 . Chelsea are keen on signing Anderlecht teenager Youri Tielemans ( pictured on the left ) Leander Dendoncker is also said to be on Chelsea 's radar after impressing for Anderlecht in recent weeks . Dendoncker , 19 , is a more defensive player and can operate in midfield or at centre back . He scored Anderlecht 's second goal in a feisty 2-0 win over Kortrijk on Sunday which saw both sides reduced to 10 men while Tielemans was one of four players booked . Belgium newspaper HLN reported that Chelsea scout Tony White was in the crowd to watch the game . Meanwhile , Chelsea have extended contracts for 18-year-old Belgian Charly Musonda Jnr to 2019 and his elder brother Tika Musonda until 2016 .
Chelsea are monitoring the progress of the two teenagers . Manchester United and scouts have also been linked with Youri academy . he made his Champions league debut at the age of 17 .