Chances were at a premium in Birmingham but the home side had Argentina international Martinez to thank for keeping the scores level.
Erik Ten Hag was certainly not pleased with his side's defending particularly during the 95th minute where Man Utd conceded the goal which resulted in the loss against Brighton.
Sumit Nagal lost 6-3, 6-3 to China's Wu Yibing in the first round at Shanghai Masters.
Paris St Germain won 4-1 at Le Havre, capitalising on a late collapse by the hosts to get their Ligue 1 season off to an excellent start.
India won a record haul of seven gold, nine silver, and 13 bronze medals at the 2024 Paris Paralympics.