Ferrero won the first set, 7-5, before Bihhdan Ulihrach of the Czech Republic retired due to tendinitis in his wrist. Ferrero claimed the title last year when Russia's Marat Safin retired with a back injury.
Johansson, the Australian Open champion, breezed to a 6-3, 6-0 victory over Spain's Albert Costa,
Fourth-seeded Sebastian Grosjean of France posted a 6-2, 6-2 triumph over Austria's Stefan Koubek and fifth seed Tim Henman of Britain had an even easier time against wild card Omar Bahrouzyan of the United Arab Emirates, 6-1, 6-0.
In other first-round matches, Croatia's Ivan Ljubicic defeated Frenchman Cedric Pioline, 6-3, 6-2; Spain's Alex Calatrava ousted Russia's Mikhail Youzhny, 6-3, 6-4; Sjeng Schalken of the Netherlands got by Frenchman Arnaud Clement, 6-3, 7-6 (7-1); and Germany's Rainer Schuettler rolled to a 6-3, 6-2 win over Tommy Robredo of Spain.