For Haase, partly due to numerous injuries, it dropped to place 324 in the world rankings, it was his first final since the beginning of 2020. Then he had to give up in Bangkok due to physical problems. Haase booked his last tournament victory on a challenger in the Romanian city of Sibiu. At the highest level, the ATP Tour, he won the Kitzbühel tournament twice (in 2011 and 2012).