Both top seeds at the ATP-WTA Adelaide International suffered quarter-final shocks on Thursday, with Elena Rybakina and Tommy Paul exiting in straight sets. World number three Rybakina, the 2022 Wimbledon champion and last year’s Australian Open finalist, was stunned 6-3, 6-3 by Ekaterina Alexandrova, who led 4-0 in both sets. American Paul crashed 6-1, 6-4...