Tiger Woods has won two of his three Claret Jugs at St Andrews and his close friend Fred Couples talked up his changes ahead of the landmark championship.
Rory McIlroy appears to have the TaylorMade Stealth UDI in the bag this week as he looks to win his first major championship in eight years and his second Claret Jug.
Open champions Tiger Woods, Rory McIlroy and Paul Lawrie have accepted invitations to become Honorary Members of The Royal and Ancient Golf Club of St Andrews.
Rory McIlroy won the Claret Jug in 2014, but this was the last year that the Northern Irishman won a major title and it's been a series of disappointments since then.
Tommy Fleetwood and Sky Sports' Henni Goya were special guests of HSBC and the Golf Foundation, spending time at St Andrews with eight youngsters from Monifieth Golf Club.