Former world No. 3 Dominic Thiem has revealed he plans to play every week before the French Open. Thiem, 28, made his long-awaited comeback from a wrist injury in late March. After the Marbella Challenger, Thiem tested positive for COVID-19 and skipped Marrakech and Monte Carlo. Thiem has recovered from COVID-19 and his crowded schedule begins this week at the Serbia Open in Belgrade. “A long recovery is behind me. I am happy to be back in Belgrade. I was here two years ago when I won the Adria Tour.Last year I wanted to go back, but I had an arm …