Professional tennis players are expected to perform at top level at all times, but there are a lot of external factors that hamper their ability to show their best, a major one being tight scheduling. As many as three players who reached the semifinals of Abu Dhabi last week have lost in the first round of this week’s Qatar TotalEnergies Open, in straight sets. Moreover, Cluj-Napoca champion Karolina Pliskova slept for just four hours ahead of her Doha opener.