American veteran Andre Agassi kept his US Open campaign alive and staved off retirement with a stunning 6-4 6-4 3-6 5-7 7-5 victory over a stubborn Marcos Baghdatis of Cyprus to reach the third round on Thursday. Agassi extended his run by closing out an extraordinary fifth set against a cramping Baghdatis with a service break to finish the three-hour 48-minute contest.