Davis Cup return for Nadal

The three-day, best-of-five first round clash takes place in Charleroi from March 4-6.

Nadal has not competed since losing his quarter-final at the Australian Open against compatriot David Ferrer, having suffered a muscle tear in his right leg early in the match.

Ferrer will also be in the line-up for that clash, as will Fernando Verdasco and Feliciano Lopez.

"Having the number one and the best sportsman of 2010 in the side gives us stability," captain Costa said on Thursday.

"After the small injury he had in Australia he did the work needed to get back into training," Costa added. "He's coming back gradually and when he joins our training camp he'll be in perfect condition."

The winner of nine Grand Slams did not represent Spain in 2010, last turning out for the nation in the final of the 2009 tournament, which Spain won.

Spain have a winning record against Belgium in Davis Cup, triumphing on two of the three occasions that they have met in the competition.