VANCOUVER — An upset loss by Gabriel Diallo resulted in Canada splitting its opening singles matches Friday in the first round of Davis Cup Qualifiers. Montreal’s Diallo, ranked 39th in the world, lost to No. 253-ranked Gustavo Heide 6-7 (4), 6-3, 6-7 (3) in a two hour, 42-minute match at Douglas Mitchell Thunderbird Arena. In the evening’s opening match,...
