Former world No. 1 Andy Roddick says he is not concerned by Rafael Nadal because the Spaniard looks like someone who hasn’t played in a while. After being sidelined for a month and a half, Nadal kicked off his clay season in Madrid. In his Madrid opener, Nadal defeated Miomir Kecmanovic 6-1 7-6 (4). The following day, Nadal edged out David Goffin 6-3 5-7 7-6 (9) to reach the Madrid quarterfinal. After the win over Kecmanovic, Roddick was asked on Tennis Channel to rate Nadal’s performance from 1 out of 10. “Yeah, I mean probably abo …