Daniil Medvedev has withdrawn from the Kremlin Cup because of fatigue, two days after winning the Shanghai Masters.

The fourth-ranked Russian was coming into the Moscow tournament as the No. 1 seed after beating Alexander Zverev in the Shanghai final on Sunday.

He’s reached the final of his last six consecutive tournaments, including the US Open, which has meant a busy playing schedule.

Russian news agency Tass quoted Medvedev as saying that he felt “drained psychologically and physically” after his Shanghai victory.

In Tuesday’s matches, eighth-seeded Serbian Miomir Kecmanovic won his first-round meeting with Russian Artyom Dubrivny 6-1 7-5.