Miami, FL (SportsNetwork.com) - American Donald Young was an easy first-round winner at the $5.4 million Miami Open -- the second straight Masters 1000 event on the ATP World Tour.

The left-handed Young was leading Yen-Hsun Lu 5-1 in the first set on Day 1 when the Taiwanese player retired on the hardcourts at the Tennis Center at Crandon Park.

Up next for Young will be third-seeded Australian Open runner-up and two-time Miami titlist Andy Murray.

Also on Wednesday, Argentine Carlos Berlocq topped promising Aussie Thanasi Kokkinakis 6-4, 3-6, 6-2 and Jan-Lennard Struff overcame fellow German Benjamin Becker 3-6, 7-6 (12-10), 6-4.

The top seeds here are Australian Open and Wimbledon champion Novak Djokovic, French Open king Rafael Nadal, Murray, and U.S. Open finalist Kei Nishikori. The four-time Miami champion Djokovic beat the four-time runner-up Nadal in last year's marquee finale, which was a rematch of the 2011 final that was also captured by Djokovic in South Florida. The great Nadal has yet to title in Miami.

Last week's Indian Wells Masters runner-up and two-time Miami winner Roger Federer is not playing at this mandatory event.

The 2015 Miami champ will claim $900,400.