Australian Casey Dellacqua is out of the Hobart International after a second-round loss to American Alison Riske.

Dellacqua went down 7-5 4-6 6-3 to the 55th-ranked Riske in windy conditions at the Domain Tennis Centre.

Riske broke the West Australian three times to Dellacqua’s two in the final set, overcoming two double faults and a break point in the final game as she served out the match.

The 23-year-old American, who made the fourth round at the US Open last year, will play China’s Zhang Shuai or Czech Klara Zakopalova in the quarter-finals.

Dellacqua, who made three grand slam finals with doubles partner Ashleigh Barty last year, beat Belgian qualifier Alison Van Uytvanck in the first round.

The 28-year-old left-hander will now head to Melbourne looking for a first major doubles title with the young Australian.

In a first set that included six consecutive breaks of serve, it was Riske who got the crucial one when leading 6-5.

The American converted her first set point with a sizzling forehand down the line to take the set 7-5.

Dellacqua broke Riske twice in the second and was down 0-40 serving for the set at 5-4.

She won four straight points to take it 6-4 when Riske netted a first set point.

In first round matches, Australian teenager Storm Sanders marked her WTA main draw debut with a 6-2 6-2 thrashing of world No.39 Peng Shuai.

The 19-year-old is ranked No.234 in the world, 195 places behind world No.39 Peng.

Sanders will play Wimbledon semi-finalist Kirsten Flipkens, the second seed, in the next round.

Defending champion Elena Vesnina progressed to the second round with a 6-4 6-4 win over Puerto Rican Monica Puig.