The ATP Tour moves to clay this week with ATP 250 events in Houston and Marrakech. Taylor Fritz, Reilly Opelka and John Isner lead the field at the Fayez Sarofim & Co. U.S. Men’s Clay Court Championship in Houston, while Canadian star Felix Auger-Aliassime is chasing his second title of the year at the Grand Prix Hassan II in Marrakech.Both tournaments return after two years of absence due to the Covid-19 pandemic. Five things to watch in Marrakech 1) Will Felix bounce back?: Felix-Auger-Aliassime’s strong start to 2022 has included ATP Cup glory with Canada and a maiden tour-level title in Rotterdam.Now the 21-year-old will try to find better form on the clay of Marrakech, where he is the top favourite. Auger-Aliassime competes for the first ti …