U.S. Open | Alcaraz gets easy start to title defence, Medvedev advances

Carlos Alcaraz has surrendered the number one world ranking but got his U.S. Open title defence off to an easy start as injured German Dominik Koepfer retired against the 20-year-old top seed

Carlos Alcaraz has surrendered the number one world ranking but got his U.S. Open title defence off to an easy start as injured German Dominik Koepfer retired against the 20-year-old top seed on Tuesday.

The season's final Grand Slam began on Monday with a change at the top after Novak Djokovic demolished Frenchman Alexandre Muller to ease into the second round — a result that meant the Serb will replace Alcaraz as world number one when the rankings are updated on Sept. 11.

But Alcaraz will have the number one attached to his name for the duration of the Flushing Meadows fortnight and advanced to the second round after Koepfer twisted his ankle minutes into the match and later retired with the Spaniard up 6-2 3-2.

Alcaraz, bidding to become the first man to retain his U.S. Open crown since Roger Federer won five straight from 2004 to 2008, appeared unsteady at times on the North American hardcourts ahead of the season's final Grand Slam but kept his composure on Tuesday with few errors.

"I'm not thinking about defending the title. I was not thinking about I was the champion last year," he told reporters.

"I just focus on play my best level, to recover the level that I played last year, try to do same things that I did last year. That's the only thing that I'm thinking right now."

With Alcaraz and Djokovic hogging the spotlight, Daniil Medvedev had been the forgotten man but the third seeded Russian remains a threat to claim his second U.S. Open title in three years.