Former Wimbledon champion Boris Becker admitted to being taken aback by Andy Murray's decision to reunite with former coach Ivan Lendl.
Murray has enlisted the help of US-based Lendl, two years after parting ways with the Czech-born former world number one.
The world number two won an Olympic Gold medal, and two grand slam titles while under the guidance of Lendl and is perhaps looking for an edge over Novak Djokovic, to whom Murray has lost on 13 occassions since parting ways with Lendl.
Djokovic's coach, Becker, was surprised by the choice as he believes Jamie Delgado has been doing great work with the Scot.
"I was a bit surprised I must say, I think (Jamie) Delgado did a good job, Andy's never played better on clay," Becker told the BBC.
The German has helped take Djokovic to the next level over the last few years, leaving Murray playing catch-up to the dominant Serbian, who completed a career grand slam when he won the Roland Garros title this year.
Another former player, John McEnroe, has returned to coaching, taking on an advisory role with Canada's Milos Raonic and Becker thinks the involvement of former stars is great for the game.
"Let's face it we do understand the game probably more than most, so everybody benefits," the German said.
"I think it's great for the game that stars like Ivan and John are back in it, and it's good for the quality of the tennis."