The sixth-seeded Felix Auger-Aliassime was defeated 4-6, 6-3, 7-6 (2), 7-6 (3) by No. 71 Jiri Lehecka of the Czech Republic, an unseeded player who already had upset No. 21 seed Borna Coric and No. 11 Cameron Norrie earlier in the week. The Montreal native said he has had a tough week.