For Luisa Stefani, the WTA250 Chennai Open has ended her one-year injury layoff in the best possible way. Dabrowski won her maiden Grand Slam title in mixed doubles with India’s top-ranked men’s doubles player Rohan Bopanna at the 2017 French Open. Stefani’s coach at that time was Sanjay Singh, who was also Leander Paes’ coach when the Indian won the …