The worst seems to be behind for the Indian IT services sector. During the second quarter earnings, which begin on 7 October with Tata Consultancy Services (TCS) Ltd, companies are expected to upgrade their revenue growth guidance on the back of sequential improvement in revenue and strong demand for digital services, analysts said. “We expect Q2 FY21 to mark the beginning of guidance upgrades by companies and estimate upgrades by the Street,” Edelweiss Securities said in a note. It expects companies to report their highest order book in history, substantial revenue acceleration, modest margin expansion, and massive outlook upgrades.While TCS does not give a formal guidance, last quarter, Infosys Ltd had provided a revenue growth guidance of 0-2% in constant currency for 2020-21. Wipro Ltd continued to refrain from providing quarterly guidance citing uncertainties due to the covid-19 pandemic. The revenues are expected to improve on a sequential basis led by ramp up of past deal wins, traction in digital technologies, and easing of supply side pressure.