New York, USA, 15 February 2019 | AAP / tennis.com.au

Australian John Millman has suffered an upset in the second round of the New York Open, losing to Guillermo Garcia-Lopez in a tight three-setter.

The world No.102 Spaniard broke the fourth seed’s serve just once on his way to a gutsy 7-6(4) 1-6 6-4 victory in two hours and 11 minutes.

It leaves Jordan Thompson as the only Australian left in the ATP 250 event after booking a quarterfinal clash with big-serving American John Isner, who beat Bernard Tomic in straight sets.

https://twitter.com/NewYorkOpen/status/1096114642018013186

Despite the loss, it has still been an impressive start to the season for Millman, who until now had not lost an opening-round match in 2019.

He reached the second round at both the Brisbane International and the Australian Open – where he fell in five thrilling sets to Roberto Bautista Agut – and advanced to the quarterfinals of the Sydney International, where it took Gilles Simon to stop him in a third-set tiebreak.

He also won his singles rubber in Australia’s dominant performance against Bosnia & Herzegovina in the Davis Cup qualifying tie in Adelaide.