By Sedara Oluwadara Ronaldo has a year left on his Manchester United contract plus an optional year Chelsea have ended their interest in signing Manchester United forward Cristiano Ronaldo.   The Portuguese international, 37, wants to leave the club and has been linked with a move to Stamford Bridge.       But after signing former Manchester City forward Raheem Sterling on Wednesday, Chelsea boss Thomas Tuchel said his "focus is on defence".   Manchester United boss Erik ten Hag has also said Ronaldo is "in our plans" and "not for sale".   The forward has yet to join