From reading UCLA’s website, they could be training either once or twice that day, at 10 a.m. and/or 5 p.m.
Last year they had a time table but not this time, so I’m not exactly sure
» http://newsroom.ucla.edu/stories/real-madrid-to-train-at-ucla-july-22-28
Hope that helps :)
EDIT: Just got it confirmed that there will be two sessions tomorrow, one at 10am and one at 5pm