Grace Harris has finally found some form with the bat in the Women's Premier League - only for the Australian's bowling to take a rare old caning near the end of a heavy defeat for her UP Warriorz team.

Ebullient batting allrounder Harris had endured a wretched drought in her first four matches of the Indian competition this year, able to muster just 26 runs, and she was happy to easily eclipse that figure in just one rumbustious outing at Bengaluru on Wednesday.

Opening the UP innings after they had been asked to bat by Mumbai Indians, the big-hitting Harris finally found her stride, clouting 45 off just 26 balls, with six fours and two sixes, to top-score for the Warriorz, who went on to struggle to amass 9-142 off their 20 overs.

Harris's international teammate, Australia vice-captain Tahlia McGrath, who has also been short of runs, only managed one before she was bowled by Sanskriti Gupta, taking her season tally to a measly 26.

Nat Sciver-Brunt did most of the damage for Mumbai with 3-18 off four overs, but that was just a warm-up act for the star England allrounder, who went on to hammer an unbeaten 75 off 44 balls to make the chase look easy alongside West Indian Hayley Matthews.

The pair put on 133 for the second wicket before Matthews was dismissed for a 50-ball 59 by England spinner Sophie Ecclestone, but the damage was already done as Mumbai raced to 2-143, wrapping up victory with three overs to spare.

It was only a couple of matches ago when 31-year-old Harris was celebrating finishing a WPL innings with a hat-trick against Delhi Capitals on the same ground, but this time she found her spin roughly treated by Matthews, as she conceded 22, including a six and three fours, in the penultimate over of the match.

It left her with figures of 0-29 off her two overs, while McGrath finished with 0-11 off her two.

The win puts Mumbai top of the table on six points, ahead of Meg Lanning's Delhi Capitals on net run-rate, having played one match fewer.