Real Madrid's defenders have not been performing as well as they should in pre-season and need to lift their game for the coming campaign, according to centre-back Ricardo Carvalho.
"We know we have to improve and we are working on it," the Portuguese was quoted as saying in Friday's edition of sports daily Marca.
"It's not normal that we are letting in so many goals and we have to work better as a team," the former Chelsea player added.
Jose Mourinho's side begin their quest to deny Barcelona a club record-equalling fourth straight domestic at Real Zaragoza on Sunday.
"We'll try to use our weapons, pressuring them high up the pitch and trying to get the ball off them," Oriol, whose brother Edu played for Barca's B team before joining Zaragoza.
"We have always played really good matches against Barca and we'll try to do so again," he told a news conference.
German international Muller netted 40 in the 1971/72 campaign, a record for Europe's top five leagues. Ronaldo's 40 last season was the most ever in La Liga, beating a previous best mark of 38 jointly held by Zarra and Hugo Sanchez.
"Valencia has the option until August 31 and we have to be ready in case we can improve things," Emery told a news conference, adding that the club were not only interested in another defender.
Coach Manuel Pellegrini wants his side, which narrowly avoided relegation last term, to qualify for Europe next season and is also eyeing a strong performance in the King's Cup.
"We have a very good squad and it's up to the players to show
