Australian Matthew Ebden has set-up a quarter-final showdown with top seed Fabio Fognini after a tough second round win at the Chengdu Open.
Ebden edged another Italian, Matteo Berrettinis 6-3 3-6 7-6 (7-3) in two hours on Thursday.
Fognini enjoyed a more routine 6-4 7-6 (7-2) win over Ruben Bemelmans.
Sam Querrey was a 6-1 6-4 victor over Nikoloz Basilashvili and Taylor Fritz also progressed to the last eight with a 7-5 6-1 result against Mikhail Kukushkin.
Ebden is joined by countryman Bernard Tomic in the quarter-finals, the one time world No.17 with an opportunity to progress to the last four when he plays Canadian lucky loser Felix Auger-Aliassime.
Tomic battled his way through qualifying at the China event, the world No.123 eyeing off a return to the top 100.
