Madrid, Madrid, Spain, 3 May 2015 | AFP

Casey Dellacqua has beaten 2010 French Open champion Francesca Schiavone to reach the second round of the Madrid Open, while world No.7 Ana Ivanovic survived a scare.

Dellacqua dumped Schiavone out of the tournament with a 6-4 7-6(5) win to kickstart her own French Open preparations.

The Australian top 50 star will next face No.9 seed Agnieszka Radwanska, who overcame Spaniard Lara Arruabarrena.

Ivanovic fought back from a set down to also move into the second round on Sunday after Alexandra Dulgheru retired when trailing 4-0 in the decider.

The Romanian wildcard shocked Eugenie Bouchard on Fed Cup duty last month and looked on course to produce another upset as she eased through the first set 6-2 and then broke the Serbian to serve for the match at 6-5 in the second.

However, Ivanovic broke straight back and then romped through the tie-break 7-1 to force a deciding set.

Dulgheru withdrew after Ivanovic took a commanding 4-0 lead in the third set.

Eighth seed Ekaterina Makarova was a high-profile exit, though, as she was routed by fellow Russian Svetlana Kuvenetsova 6-2 6-1.