Two-time champion John Isner has confirmed he will return for January's Auckland Classic tennis tournament.
The 32-year-old American No.1 hard court exponent has captured two ATP Tour titles this year and made semi-final appearances at the Rome and Cincinnati Masters events.
Isner has fond memories of Auckland, and is keen to again use it as a sharpener for the Australian Open.
"Auckland will always hold a special place in my heart, it's where I won my first ATP title," he said.
"I love Auckland, I've always played well there and I can't wait to get back there in 2018."
Isner's two titles came in 2010 and 2014 and he has made at least the quarter-finals in all three of his other appearances.
The 2.08m Isner's serve is considered the biggest in the game, but his consistency in recent years has come off the back of significant strides in his ground strokes and net play.
The big American is expected to jump to at least 13th in the world when the updated rankings are released next week, and could leap as high as ninth depending on results.
Spaniard Roberto Bautista Agut, the 2016 champion, has already confirmed for next year's men's draw.
The 2018 Classic will span two weeks; the women's tournament running from January 1-6, followed by the men's tournament from January 8-13.