The Tottenham youngster featured against Juventus on Tuesday, and the former defender suggested he had characteristics similar to the Barcelona star.
Keane starred for the Bhoys during a loan spell at Celtic Park in 2010.
Merson expects Tottenham to be outclassed by Chelsea.
Benjamin Mendy was reportedly on Tottenham Hotspur's list of transfer targets last summer.
Richard Keys urges Tottenham chairman Daniel Levy to change course.
Armenian starred for Manchester United in win over Feyenoord.
Chelsea and Tottenham Hotspur will face each other in the Premier League this weekend.
Chelsea host Tottenham this weekend.
The Leeds United player may get chances with the summer loan signing ruled out for the next few weeks.
The former Chelsea midfielder and assistant manager believes there is one way Spurs can beat the leaders.
Manchester United back-up impressed against Feyenoord.