Valverde indicated he would be cautious with Messi's fitness.
"It's an open tie, we have great players and they do too, some of the best in the world". "I am not very supportive of taking risks when there are so many games ahead", Valverde said.
There is little doubt Benzema will start, as he has six goals in the last four matches.
Solari recently spoke to the media and confirmed he has a fully-fit squad available for the semi-final first leg.
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Messi has been in typically imperious form this season, netting almost 30 goals in all competitions but Valverde says that Barcelona have enough firepower in their arsenal to overcome Real Madrid even if their captain isn't on the field.
Ousmane Dembele's hamstring problems rule him out of the game which means Phillipe Coutinho who is not having much of impact in games is likely to continue up front. Valverde said the Frenchman trained separately on Monday and was set to join the rest of the squad for Tuesday's session. We'll make a decision based on that. "The calendar is very complicated", he said.
"In a semi-final between Barca and Madrid there's no favorite. We are in a decisive part of the season".
Real Madrid made up a couple of points on Barcelona in La Liga at the weekend, deservedly beating Alaves on Sunday after Barca had been a tad fortunate to emerge with a point from their clash with Valencia at Mestalla a day earlier. There were thumped 5-1 when the last times met in Nou Camp and revenge is something that will be on the minds of the Real players. "We just have to go out there and give our best".