Two-time champion John Isner is returning to Auckland's ASB Classic.
The 32-year-old claimed the ASB Classic title in 2010 and 2014, and has reached at least the quarterfinals in all three of his other appearances.
Currently ranked 16th in the world, Isner captured two ATP Tour titles (Newport and Atlanta) in 2017 and made semifinal appearances at the Rome and Cincinnati Masters events.
However, it is fond memories of Auckland that ensures there is no question where his preparations for the Australian Open will commence.
"Auckland will always hold a special place in my heart, it's where I won my first ATP title. I love Auckland, I've always played well there and I can't wait to get back there in 2018," said Isner.