The former world number one has been granted a wildcard for the Sydney International tennis tournament.
Ivan Ljubicic reached his second final in two weeks when he beat fifth-seeded Spaniard Tommy Robredo.
The defending champion was beaten by wildcard compatriot Alex Correjta in 69 minutes in the Monte Carlo Masters.
The French Open champion will clash with fellow Spaniard Juan Carlos Ferrero in the quarterfinal of the Swedish Open
World number one Roger Federer breezed through to the Halle Open semi-finals with a 6-3, 6-4 win over Germany's Philipp Kohlschreiber.
The Aussie ace feels his rapid slide down the world rankings could give Australia the advantage in the Davis Cup final against Spain.
The two former world number ones and French Open champions traded blows and counter-punches for two hours 48 minutes.
Nadal also won through to the final of the doubles with fellow-Spaniard Feliciano Lopez at the Barcelona Open.
The Spaniard's revival continued with an enthralling 6-4, 4-6, 6-3 victory over Argentine Gaston Gaudio to earn a place in the semis of the Barcelona Open.
Juan Carlos Ferrero became the first seeded casualty at the US Open after he was beaten by fellow Spaniard Feliciano Lopez.
Andy Roddick and Guillermo Coria raced into the fourth round with crushing victories.
The fifth seeded pair defeated Spaniards Juan Ignacio Carrasco and Juan Carlos Ferrero 6-3, 6-3, 6-4
Former world number one Carlos Moya confidently leads another Spanish assault on the red clay of Roland Garros next week.
World number one Roger Federer faces a potential third-round showdown with three-times winner Gustavo Kuerten in a tough opening week at the French Open.
Both countries took a 2-0 lead over The Netherlands and Argentina respectively in their Davis Cup World Group quarter-finals.\n\n
The second seeded Federer will take on Juan Carlos Ferrero in the semi-finals of the Australian Open.
Juan Carlos Ferrero battled past Swede Joachim Johansson to reach the fourth round of the Aus Open.