Boris Becker has refused to rule out a coaching reunion with Novak Djokovic while claiming the Serb needs to rediscover his motivation for tennis.
Djokovic has struggled since winning the French Open title mid-way through last season with early exits from the Rio Olympics Wimbledon and this year's Australian Open highlighting his poor form.
Becker split with Djokovic at the end of the last campaign as Andy Murray overtook the 29-year-old as the new world number one.
Despite going their separate ways, the German still thinks it's possible that they could reunite in the future.
"Would I go back and coach him? I'll always be a friend and I'll always be in his corner. We are on very good terms. I don't know, let's see what happens," Becker said.
— Boris Becker (@TheBorisBecker) 24 January 2017
Victory at the French Open last year meant that Djokovic has now won all of the Grand Slams at least once and Becker thinks he lost his motivation following that triumph.
"People don't realise what it takes to win one Grand Slam. Imagine – he won four in a row, he was the holder of the real Grand Slam," Becker added.
"A lifelong dream was fulfilled. Of course the bubble burst. Of course your mind goes off course. Of course his family wants him back. He's a human being with a big heart.
"He's a strong player and of course the motivation goes a little bit. To get it back you have to go back to the practice court and it's not easy when you've been on top."