An on-the-mend Serena Williams joined gal pal Christina Milian for some late-night entertainment in Beverly Hills Tuesday night.  The world’s top-ranked tennis player and the R&B singer dined at the exclusive Madeo restaurant, following with stops at the posh restaurant/lounge Geisha and trendy hot spot Angels and Demons.

Williams can be seen sporting an over-sized surgical boot, having undergone surgery to repair cuts to her right foot.  The World No. 1 sustained serious damage after stepping on shattered glass in a restaurant earlier this month.

The 13-time Grand Slam champion was forced to pull out of Istanbul, Cincinnati, Montreal and World Team Tennis.  Williams said she hopes her foot will heal in time for the US Open, scheduled to begin in late August.