Lucknow, Apr 14 (UNI) A masterclass in late-overs execution by Chennai Super Kings bowlers, led by Matheesha Pathirana and Ravindra Jadeja, helped the visitors restrict Lucknow Super Giants to 166 for seven in their allotted 20 overs in an IPL clash at Bhrat Ratna Shri Atal Bihari Vajpayee Ekana Stadium here on Monday.