In women's 48kg weightlifting on the opening day of competitions, Sanjita won with a total lift of 173kg (77+96), while Mirabai grabbed the silver with a cumulative effort of 170 (75+95) in the absence of other strong competitors.
Nigeria's Nkechi Opara was a distant third with 162 (70+92).
Sanjita's total of 173kg missed the Games record, held in the name of 2010 CWG gold winner Augustina Nkem Nwaokolo (175kg effort) by two kilograms. Sanjita's 77kg effort in snatch however equalled Nwaokolo's CWG record.
It was basically a contest between the two Manipuris in an event which India had dominated for long in the Commonwealth Games from the days of Kunjarani Devi.
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Earlier, judokas Navjot Chana and Shushila Likmabam assured the team of at least two silver while the paddlers, shuttlers and squash players had easy outings.
In the men's 60 kg, Chana defeated Daniel Le Grange of South Africa in just 1 minute and 51 seconds to storm into the medal round. He will take on Ashley McKenzie of England in the final later in the day.
In the women's section, Shushila Likmabam reached the finals in the 48 kg category defeating Aussie rival Chloe Rayner in two minutes and 23 seconds. Sushila got a couple of Wazaris that is equivalent to an 'Ippon' which finished the bout. She will lock horns with Kimberley Renicks of Scotland in the final.