Madrid [Spain], April 30 (ANI): Francisco Cerundolo bagged his third Top 5 victory on Tuesday at the Madrid Open as he upset World No. 5 Alexander Zverev to reach his fourth ATP Masters 1000 quarterfinal. The Argentine saved both break points he faced to register a 6-3, 6-4 win over the two-time Madrid champ Zverev after a 90-minute battle. According to ATP stats, the Argentine won 79 per cent (33/42) of his first-serve points and saved both break points that he faced. Since Juan Martin del Potro advanced to the round of eight in the Spanish capital in 2012, Cerundolo is the first Argentine to…