كتب : Ahmad Saied
The Dutch striker has been granted permission from the club to pull out from the camp because his wife is expecting a baby, the paper added.
Van Nistelrooy's surprising exit prompted coach Fabio Capello to include Ronaldo in the squad for the first time since he underwent a knee injury mid July.
Capello said earlier this month that Ronaldo has to lose more weight before playing but he was forced to summon the 30-year-old striker before his duo comeback against Atletico Madrid next week.
Real Madrid are placed third in Group E with no points after losing to Lyon 2-0 in their group opener.
They top Dynamo who were crushed by Steaua Bucharest 4-1 in the same group.