In the red group, their respective records in their group, World no. 1 Victoria Azarenka was 7–14, Serena Williams was 16–3, Angelique Kerber was 2–8 and Li Na was 10–10. Leading the group Azarenka, has a poor record against Williams being 1–10 lifetime against her and having lost their last eight encounters, 4 times in 2012. Most recently they met in the finals of the 2012 US Open with Williams winning 6–2, 2–6, 7–5. Against Kerber, she has a 2–0 record winning both encounters in 2012, the last in the quarterfinals of the 2012 London Olympics 6–4, 7–5. Against Li, their head-to-head is tied at 4–4 but Azarenka has won their last three encounters, 2 coming in 2012, last meeting a 3–6, 6–3, 6–3 win in the quarterfinals of the 2012 Mutua Madrid Open. Williams on the other hand, is tied at 1–1 head-to-head against Kerber losing their only encounter of 2012 at the 2012 Western &amp; Southern Open 6–4, 6–4. Against Li, she is 5–1 lifetime having won their last four encounters, the last encounter coming at the 2010 Wimbledon Championships 7–5, 6–3. Kerber and Li, the head-to-head is 5–1 in favor of Li who has won their last two encounters. They met 3 times in 2012, most recently in the finals of the 2012 Western &amp; Southern Open with Li winning 1–6, 6–3, 6–1.