
Veteran US golfer Phil Mickelson and his long-time caddie Jim "Bones" Mackay announced their split after 25 years together. The pair -- pictured here at the 1995 US Open -- won five majors together.

After a succession of near misses, Mickelson clinched his first major, the Masters at Augusta, in 2004.

Mackay, commonly known as "Bones," was introduced to his future wife Jen by her best friend, Mickelson's wife Amy.

Mickelson just needs the US Open to complete the grand slam of all four majors but with a record six runner-up spots it has become his nemesis.

Mickelson and Mackay won a third Masters together in 2010, as well as the 2005 US PGA and the 2013 British Open.

The pair are great friends and were known for their lengthy and passionate discussions over club selection and shot-making.

Mackay, 52, is known as one of the world's best and most assiduous caddies and regularly walks the golf course before a round to scout out pin positions and conditions.

Mickelson and Mackay appeared in 11 Ryder Cups together and were on the winning side three times.

As well as three green jackets, Mickelson has had eight other top-five finishes at Augusta alongside Mackay.