Liverpool boss Rafael Benitez is uncertain how Ronaldo's departure will impact Manchester United's title challenge this season but is confident the Reds have the squad to match the defending champions.
United have only spent around a quarter of the £80million they received from Real Madrid for the Portugal winger on Antonio Valencia from Wigan and Bordeaux's Gabriel Obertan while Michael Owen joined the club after his Newcastle contract expired.
However, Carlos Tevez also left Old Trafford for Manchester City and it remains to be seen how both his and Ronaldo's exits will affect the Red Devils this season.
Benitez, whose only major signing so far this summer is full-back Glen Johnson, downplayed the significance of Ronaldo's departure but believes United's spending is not over despite Sir Alex Ferguson's previous claims to the contrary.
"I don't know," he said when asked if Ronaldo's switch to Real Madrid means Liverpool now have a better chance of winning the Premier League.
"I'm sure that they will have some money and they will buy some players so they will be strong but we've really improved with Glen (Johnson) so hopefully we can be a little bit better and it will be enough."