India take on Malaysia in the quarterfinal of the Champions Challenge hockey tournament in Johannesburg today. Despite two convincing wins on the trot, India will have to guard against complacency when they face an unpredictable Malaysia India topped Pool A while Malaysia, despite finishing last in Pool B, advanced as the new format allows all eight competing nations a place in the knock-out rounds.Two big wins against hosts South Africa and Poland have boosted India's confidence, but Malaysia will be eager to salvage pride after a lackluster show in the three group matches.India have enjoyed an edge over Malaysia in this year's encounters, but last year's Asian Games semi-final loss to the same rivals will always stay at the back of the players' mind.