A shocking coaching change, off-court distractions, the pressure of added expectations as world No. 1: There's no one-size-fits-all explanation for Naomi Osaka's struggles since winning the Australian Open.
All three were among the reasons American tennis legends and commentators Chris Evert and John McEnroe cited last week in a conference call with reporters in the lead-up to Wimbledon, which starts Monday.
Osaka has gone 13-6 since winning her second consecutive slam and her surprise announcement shortly afterward that she had split with coach Sascha Bajin. She's yet to play in a tournament final since, only making it as far as the semifinals once in eight tries. After multiple close calls, she finally lost her No. 1 ranking to Ash Barty last week.