Chengdu, Sichuan, China, 26 September 2018 | AAP

Bernard Tomic survived a match point to reach just his second ATP quarterfinal of the year at the Chengdu Open.

The 25-year-old dug deep to beat big-serving South African Lloyd Harris 7-6(5) 2-6 7-6(6).

Fellow Australian Matt Ebden, seeded No.6 in Chengdu, will look to join Tomic in the last eight when he opens Thursday’s schedule on centre court against Italian Matteo Berrettini.

Looking to move back into the top 100 by season’s end to ensure automatic entry into Australian Open 2019, Tomic had to withstand 23 aces and an edgy tiebreaker to get the job done.

After winning a tight first set that didn’t feature a break point chance for either player, Tomic suffered a mid-match malaise and quickly found the ledger squared after having his serve broken twice in a forgettable second.

He soon found his feet again in the third, establishing a 2-0 lead, only to relinquish what would be his only break of serve in the match.

From there the set stayed on serve before Tomic pinched a mini-break in the tiebreaker and had the opportunity to serve out the clash at 5-4. But Harris had other ideas and won consecutive points off Tomic’s serve to have the match on his racquet at 6-5.

Tomic returned the favour by winning both points from the Harris serve and then served out the match.

He’ll play the winner of the match between Australian Open semifinalist Hyeon Chung and Canadian teen Felix Auger-Aliassime.

Currently ranked No.123 in the world, Tomic should rise close to No.100 should he win through to the semifinals in China.

The cut off for direct entry to the Australian Open is usually No.104.