Germany’s Tokyo champion Alexander Zverev wilted in the heat and felt unwell as he lost 7-5, 7-5 to Italy’s Lorenzo Musetti in the men’s tennis quarter-finals at the Paris Olympics on Thursday. Zverev, who was dreaming of a second straight single gold, became the last German to be knocked out of the tennis competitions at Roland Garros and said he needs blood tests after not feeling himself at times of late. “I began to notice in Hamburg that something wasn’t right,” Zverev, a diabetic, said in reference to last month’s tournament in his home city where he lost in the final to Arthur Fils. “I …