Marcos battled into the second round at the Citi Open in Washington, D.C. on Tuesday, overcoming Benoit Paire 6-3, 3-6, 6-2. He needed one hour and 30 minutes to dispatch the Frenchman, firing nine aces and claiming four of five break chances.
Eight years after reaching the final in his tournament debut, Marcos is back in the U.S. capital city. He is making his sixth appearance, owning a 13-5 record.
Marcos will face rising Korean player Hyeon Chung next. It will be their first meeting. Chung is the future of Asian tennis, having won the Next Gen ATP Finals in Milan last year.
Marcos is off to a great start in the summer hard-court season, after reaching the quarterfinals last week in Atlanta. He has now won three of his last four matches, improving to 15-6 on hard courts this year.