Nadal back in winning form

Spanish great claims title in Brazil after lengthy injury layoff

Rafael Nadal showed he is back in business by clinching his first title since ending a seven-month knee injury layoff, winning the Brazil Open on Sunday.

The Spanish former world No 1, who is yet to fully shrug off the lingering effects of his knee problems, beat Argentina's David Nalbandian 6-2, 6-3 in 78 minutes.