Ticket sales for the 2021 Breeders' Cup World Championships, to be held at Del Mar Friday and Saturday, Nov. 5 and 6, are being delayed "until we have clarity on the ever-changing landscape," Drew Fleming, the chief executive officer of Breeders' Cup Limited, said in an email distributed Monday afternoon. "With the COVID-19 vaccine now being rolled out across the country and internationally, we at the Breeders' Cup remain optimistic for the year ahead, and specifically for the 2021 World Championships," the email read, in part. "We are working closely...