At close, Uttar Pradesh were four for no loss in their first innings, after restricting Mumbai to 199, six overs before stumps, as openers Jyoti Yadav remained unbeaten on one and Shivakant Shukla was batting on two.
After losing the toss, Uttar Pradesh skipper and India star Mohd Kaif set an attacking field that put Mumbai under pressure from the begining.
As medium pacer Praveen Kumar trapped opener Vinayak Samant leg before with his first ball in the second over of the innings, Mumbai never recovered from the early setback and lost wickets at regular intervals.
Kumar was rewarded with four wickets, Salabh Srivastava bagged three and Piyush Chawla scalped two to give UP the edge.
Mumbai opener Sahil Kukreja defied the UP bowlers with a patient 49 and Ramesh Powar tried to take away the advantage before he was caught for 29, before a 46-run partnership for the last wicket between Swapnil Hazare and Avishkar Salvi rescued the hosts from further humiliation.