Hoylake - British Open champion Phil Mickelson believes his best is yet to come despite recording only one top-10 finish this year.
Mickelson won the British Open at the 20th attempt last year at the age of 43, just seven days after picking up his first title on British soil in the Scottish Open.
But since then the 44-year-old, dogged by health issues caused by suffering from psoriatic arthritis, has struggled to recapture his best form.
"Obviously it hasn't been a good year," Mickelson admitted on Monday after returning the Claret Jug to R&A officials ahead of his Open defence at Hoylake.
"Normally I would be discouraged or frustrated, but I'm just not. I feel like I've had some good breakthroughs in some areas.
"I haven't had the results, I know I haven't played well. But the parts feel a lot better than the whole right now.
"I don't know when it will all click together. I don't know if it will be this week, in three weeks or a month or what, but it should be soon.
"I feel like it's really close to being good. And rather than trying to force it or press the issue, I'm going to be patient.
"I'm driving the ball with more confidence and better than I ever have.
"I don't know if the stats show it or not, but I know that I am. This has not been a good putting year. I think that's why the results haven't been there.
"We'll see. That's why we play the game, you just never know."
Mickelson's victory at Muirfield 12 months ago made him the third consecutive British Open champion over the age of 40, following on from Darren Clarke at Sandwich in 2011 and Ernie Els in 2012.
His main focus is now on winning the US Open, a tournament he has finished runner-up in a record six times, to join Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus and Tiger Woods in claiming all four major titles.
But the world number 13 is quick to deny any suggestion that his motivation to win further titles at the other three majors is on the wane.
"I actually feel better than I have in years and I've had to work a little bit harder," added Mickelson, who withdrew from tournaments in San Diego and Texas earlier this year with back and muscle injuries respectively.
"I believe that the next five years are going to be some of the best in my career."
Mickelson revealed he keeps last year's final round at Muirfield on tape to watch whenever he needs a confidence boost and he hopes those memories can inspire him to more glory this week.
"It's just the memories and emotions that took place last year that I created and will have for a lifetime. I'd like to do it again," he said.
"I'd like to create new memories and new opportunities. And it almost motivates me to work harder and play even more, practice even more because I know there's a finite amount of time.
"As I look back on my life, I look back on the highlights of last year's tournament, and it brings out the same emotions that I experienced at the time."
Tee-off times on Thursday in the first round of the The British Open being held at the Royal Liverpool Golf Club, Hoylake (All times Local, which is GMT +1):
(x) denotes amateurs
07:25 David Duval (USA), David Howell (Eng), Robert Karlsson (Swe)
07:36 Dawie Van Der Walt (RSA), Cameron Tringale (USA), Masanori Kobayashi (Jpn)
07:47 Chris Wood (Eng), Matthew Jones (Aus), Bernd Wiesberger (Aut)
07:58 Hyung-sung Kim (Kor), Erik Compton (USA), Marc Leishman (Aus)
08:09 Koumei Oda (Jpn), Ben Martin (USA), Anirban Lahiri (Ind)
08:20 Brooks Koepka (USA), Kiradech Aphibarnrat (Tha), Edoardo Molinari (Ita)
08:31 Fredrik Jacobson (Swe), Branden Grace (RSA), Ashley Chesters (Eng)
08:42 Justin Leonard (USA), Ben Curtis (USA), Paul Lawrie (Sco)
08:53 Ryan Moore (USA), Francesco Molinari (Ita), Thorbjorn Olesen (Den)
09:04 Matteo Manassero (Ita), Bradley Neil (Sco), Mikko Ilonen (Fin)
09:15 Thomas Bjorn (Den), Patrick Reed (USA), Stewart Cink (USA)
09:26 Tom Watson (USA), Jim Furyk (USA), Darren Clarke (NIR)
09:37 Luke Donald (Eng), Rickie Fowler (USA), Sergio Garcia (Spa)
09:53 Paul Casey (Eng), Harris English (USA), Matthew Every (USA)
10:04 Tiger Woods (USA), Angel Cabrera (Arg), Henrik Stenson (Swe)
10:15 Charl Schwartzel (RSA), Padraig Harrington (Irl), K J Choi (Kor)
10:26 Hideki Matsuyama (Jpn), Rory McIlroy (NIR), Jordan Spieth (USA)
10:37 Ian Poulter (Eng), Dustin Johnson (USA), Jimmy Walker (USA)
10:48 Matt Kuchar (USA), Graeme McDowell (NIR), Louis Oosthuizen (RSA)
10:59 Hunter Mahan (USA), Stephen Gallacher (Sco), Victor Dubuisson (Fra)
11:10 Nick Faldo (Eng), Todd Hamilton (USA), Mark Calcavecchia (USA)
11:21 Brett Rumford (Aus), Ryan Palmer (USA), Tomohiro Kondo (Jpn)
11:32 John Singleton (Eng), Peter Uihlein (USA), Marc Warren (Sco)
11:43 Paul Mckechnie (Sco), Kristoffer Broberg (Swe), Juvic Pagunsan (Phi)
11:54 Rhein Gibson (Aus), Brian Harman (USA), Hyung-tae Kim (Jpn)
12:05 Oscar Floren (Swe), Chris Hanson (Eng), Yoshinobu Tsukada (Jpn)
12:26 Matthew Southgate (Eng), James Mcleary (Sco), Hiroshi Iwata (Jpn)
12:37 Roberto Castro (USA), Victor Riu (Fra), Tyrrell Hatton (Eng)
12:48 Dong-kyu Jang (Kor), Nick Watney (USA), Shawn Stefani (USA)
12:59 Y.E. Yang (Kor), D.A. Points (USA), Brendan Steele (USA)
13:10 Scott Stallings (USA), Pablo Larrazabal (Spa), Bryden Macpherson (Aus)
13:21 Charley Hoffman (USA), George Coetzee (RSA), Michael Hoey (NIR)
13:32 Brendon De Jonge (Zim), Kevin Streelman (USA), Brendon Todd (USA)
13:43 Gary Woodland (USA, Sandy Lyle (Sco), Kevin Stadler (USA)
13:54 Graham Delaet (Can), Brandt Snedeker (USA), Cheng-tsung Pan (Chn)
14:05 Boo Weekley (USA), Danny Willett (Eng), Ashun Wu (Chn)
14:16 J.B. Holmes (USA), Jonas Blixt (Swe), Chris Kirk (USA)
14:27 Miguel Angel Jimenez (ESP), Bill Haas (USA), Thongchai Jaidee (Tha)
14:38 Jason Day (Aus), Martin Kaymer (Ger), Zach Johnson (USA)
14:54 Jamie Donaldson (Wal), Webb Simpson (USA), Yusaku Miyazato (Jpn)
15:05 Phil Mickelson (USA), Ernie Els (RSA), Bubba Watson (USA)
15:16 Russell Henley (USA), Gonzalo Fernandez-Castano (ESP), Billy Horschel (USA)
15:27 Adam Scott (Aus), Justin Rose (Eng), Jason Dufner (USA)
15:38 Ryo Ishikawa (Jpn), Lee Westwood (Eng), Keegan Bradley (USA)
15:49 Kevin Na (USA), Joost Luiten (Ned), John Senden (Aus)
16:00 John Daly (USA), Tommy Fleetwood (Eng), Ross Fisher (Eng)
16:11 Rafael Cabrera Bello (ESP), Mark Wiebe (USA), Paul Dunne (Irl)
16:22 Oliver Fisher (Eng), Chesson Hadley (USA), Shane Lowry (Irl)
16:33 Richard Sterne (RSA), George McNeill (USA), Chris Stroud (USA)
16:44 Gregory Bourdy (Fra), Jin Jeong (Kor), Matthew Baldwin (Eng)
16:55 Justin Walters (RSA), Rhys Enoch (Wal), Billy Hurley (USA)
17:06 Chris Rodgers (Eng), Scott Jamieson (Sco), Byeong-Hun An (Kor)