The 2021 Maia Challenger II was a professional tennis tournament played on clay courts. It was the fourth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Maia, Portugal from 13 to 19 December 2021.
Singles main-draw entrants Seeds Country Player Rank1 SeedAndrej Martin1201Kimmer Coppejans2072Maxime Janvier2193Gastão Elias2274Nuno Borges2285João Domingues2486Tseng Chun-hsin2567Gonçalo Oliveira2848 1 Rankings are as of 6 December 2021.
Other entrants The following players received wildcards into the singles main draw: Pedro Araújo Tiago Cação Fábio Coelho
The following player received entry into the singles main draw as a special exempt: Oleg Prihodko
The following players received entry into the singles main draw as alternates: Elliot Benchetrit Oleksii Krutykh Oriol Roca Batalla
The following players received entry from the qualifying draw: Elmar Ejupovic Edoardo Lavagno Luca Potenza Damien Wenger
Champions Singles
Tseng Chun-hsin def. Nuno Borges 5–7, 7–5, 6–2.
Doubles
Nuno Borges / Francisco Cabral def. Piotr Matuszewski / David Pichler 6–4, 7–5.
References