Rafael Nadal, the world No. 2, is rejoining Spain's Davis Cup team after a 21-month absence to help lead the squad against Ukraine in Madrid as it tries to stay in the World Group.

Tommy Robredo, Fernando Verdasco and Marc Lopez will be the other members of the team.

Nadal last saw Davis Cup action on Dec. 4, 2011, when he won the fourth and deciding point in the Davis Cup final against Argentina in Seville, helping Spain win its fifth title.

Spain also won tennis' premier international team competition in 2000 and 2009 in Barcelona against Australia and the Czech Republic, respectively; in 2008 in Mar del Plata against Argentina; and in Seville in 2004 against the United States.

The 27-year-old Nadal, who won his 8th French Open title on June 9 and was off the ATP Tour for seven months due to a knee injury that plagued him after his loss at the 2012 Wimbledon tournament, plans to rejoin the team on Sept. 13.

Robredo last played Davis Cup in March 2010, while Verdasco has not played for the team since the 2011 final against Argentina.

Lopez played in the 2012 final against the Czech Republic and in the first round this year against Canada.

Pablo Carreño and David Marrero will join the other four players selected by Davis Cup captain Alex Corretja for a week of practice sessions at Madrid's Caja Magica.

Spain will play Ukraine to try to stay in the World Group, which includes the 16 top teams.

Canada beat Spain 3-2 in the first round of the Davis Cup in Vancouver in February.

Marcel Granollers, Guillermo Garcia-Lopez, Albert Ramos and Marc Lopez were on that team.

The Iberian nation was without the services of Davis Cup stalwarts Nadal and David Ferrer, as well as other key players who helped lead the country to its nearly half a dozen titles since 2000.

Spain and Ukraine will face off at the Caja Magica. The Spanish team has not played in Madrid since 2008, when it took on the United States in the semis at the Las Ventas bullring.

In that tie, Nadal crushed American Andy Roddick 6-4, 6-0, 6-4 in a rain-delayed match to move Spain into the Davis Cup final for the sixth time.

Nadal played the match on red clay, his favorite surface, and took it to Roddick, who had never dropped a set 6-0 in the 39 Davis Cup matches he had played up to that point. EFE