Simplify the following text for a Grade 10 native English-speaking person.
Original: Daniel Nestor claimed his second mixed doubles Grand Slam alongside Katarina Srebotnik who won her fourth mixed title , her first Australian , leaving her one away from a career Grand Slam , as she has now won three of the Grand Slams , needing just Wimbledon to complete her collection .
Simplified: Daniel Nestor claimed his second mixed doubles Grand Slam alongside Katarina Srebotnik who won her fourth mixed title , her first in Australia .