N'Daw, who has played 44 times for his country, started his career in France with Sochaux in 2002.
Ba joined the Blues from Premier League rivals Newcastle in January 2013 on a three-and-a-half year deal for an undisclosed fee.
The Senegalese international defender has signed an extension which will tie him to the club until 2016.
Ba's finish came just as Chelsea looked to be on the way out after Schurrle and Oscar were both denied by the woodwork - although the London side were helped by a crucial miss from the normally reliable Edinson Cavani minutes before the decisive goal.
African Players on the FIFA 100 list:
• Abédi Pelé (Ghana)
• El Hadji Diouf (Senegal)
• George Weah (Liberia)
• Jay Jay Okocha (Nigeria)
• Roger Milla (Cameroon)