India take on arch-rivals Pakistan in the Sultan Azlan Shah Cup hockey tournament at Ipoh, Malaysia, tomorrow. Defending champions India's hopes of completing a hat-trick will hinge on winning the next two games. The victories now seem essential for advancing to the final after they lost to South Korea 2-3 in their opening match. India won the Azlan Shah Cup outright in 2009 and were joint champions with South Korea in 2010.