ROME. World number one Serena Williams won her fourth consecutive title with a 6-1 6-3 victory over Victoria Azarenka at the Italian Open in Rome.As much as the score made the match seem a completely one-sided affair, Azarenka actually had multiple chances to get ahead before Williams served out the match to love after one hour and 34 minutes.Williams adds the Italian Open title to her back-to-back wins in Miami, Charleston and Madrid and heads in to Roland Garros on a career-best 24 match unbeaten streak.The victory in Rome is Williams’s second Italian Open triumph, her first coming in 2004 when she also picked her only French Open title to date.