LONDON — Angelique Kerber won her first Wimbledon championship by stopping Serena Williams' bid for a record-equaling 24th Grand Slam title.Kerber played cleanly as can be, covering the court so well and picking her spots for big shots, in a 6-3, 6-3 victory over Williams in Saturday's final.It is the 30-year-old Kerber's third Grand Slam title.