World number two Novak Djokovic has appointed six-time Grand Slam winner Boris Becker as his head coach.
The 26-year old Serb, who has also won six major titles, will start work with Becker before the Australian Open, which starts on 13 January.
Djokovic's long-time coach Marian Vajda will continue as part of his team.
"I am proud Novak invited me to become his head coach. I am sure we can achieve great things together," said former Wimbledon champion Becker, 46.
Defending Australian Open champion Djokovic has been with Vajda since 2006 but other coaches have come and gone on a regular basis during that period.
"Boris brings a fresh approach and together with Vajda he will make a winning combination," said Djokovic.
"Boris is a true legend, someone who has great tennis knowledge, and his experience will help me win new trophies, Grand Slams and other tournaments.
"He is a great person too, and I am sure he will fit in our team in the best possible way. The team is now strengthened and we hope for maximum results."