Thai Son Kwiatkowski. Photo thanhnien.vn

Ninth seed in the qualifiers Mikael Ymer of Sweden, world No 101, beat Kwiatkowski, world No 201, 5-7, 6-3, 7-6(2).

The 23-year-old Kwiatkowski has a Vietnamese mother and a Polish-American father.

Kwiatkowski won the National Collegiate Athletic Association men’s singles title in 2017. He took part in the Viet Nam Open and was knocked out in the semi-finals in January this year.

The HCM City Tennis Federation is co-ordinating with the Viet Nam Tennis Federation to naturalise him to play at the upcoming SEA Games, which will be held in the Philippines from November 30 to December 11.

VNS