Sensex, Nifty open flat; Adani Ports gains, Sun Pharma down
TCS, Lupin, SBI, Cipla, HDFC Bank, Tech Mahindra, Idea Cellular and Adani Ports gained 1-2 percent. However, Tata Motors, Sun Pharma, Wipro, UltraTech Cement and Cairn India fell 1-2 percent.