Kaka was included in the Real Madrid squad to visit struggling Real Zaragoza on Saturday, after a month out with a thigh muscle injury.
The Brazil playmaker last featured against Olympique Lyon in the Champions League at the beginning of March. Spain defender Raul Albiol is suspended.
Barca are likely to rest top scorer Lionel Messi for the visit of La Liga's basement club Xerez on Saturday with their Champions League semi-final return against Inter Milan looming next Wednesday.
"A contract extension is on track. It isn't conditional on him qualifying us for Europe," president Fernando Roig told reporters. "I like the work he has been doing...we could have news next week."
Sevilla have lost Serbia defender Ivica Dragutinovic to a torn Achilles tendon that rules him out of the trip to Getafe on Sunday, and probably the King's Cup final and the World Cup finals as well.
"No one deserves an injury like this, but him less than others, because of his commitment and for what he gives the team on and off the pitch," goalkeeper and captain Andres Palop told the club website.
"It's important Liverpool didn't get an away goal," goalscorer Diego Forlan told reporters. "We'll feel much more comfortable at Anfield with open spaces. They'll have to go for the game."
