 Complete the following phrase:  In addition to his six world titles, Davis won the UK Championship six times and the Masters three times for a total of 15 Triple Crown titles, placing him third on the all-time list behind Ronnie OSullivan 20 and Stephen Hendry 18. During the 198788 season, he became the first player to win all three Triple Crown events in a single season, a feat that only Hendry and Mark Williams have since emulated. His career total of 28 ranking titles places him fourth on the all-time list behind OSullivan 37, Hendry 36, and John Higgins 31. He won his last major title at the 1997 Masters, but continued to compete at a high level into his 50s, making the last of his record 30 Crucible appearances in 