The return of coach Ivan Lendl could be key to Andy Murray overcoming world number one Novak Djokovic and winning more Grand Slams, says former British number one John Lloyd.
Murray, 29, will resume working with Lendl on Tuesday, having split with the Czech-born American in 2014.
Eight-time major champion Lendl guided Murray to his two Grand Slam titles and Olympic gold in 2012 and 2013.
"I think it's a great signing and the right time to do it," said Lloyd.
"This to me could be the missing ingredient. He has to beat Djokovic.