Thanks mainly to four goals from Claire Walmsley, Coventry built a 7-4 lead by the early stages of the third period. It was 8-6 at the start of the last, but Otter quickly levelled with goals by Brooke Tafazolli and Lex Higlett.
Rhianne Oscroft restored a narrow advantage for Coventry before Katherine Rogers' goal three minutes from the end left it all square.
Manchester and Caledonia went goal crazy in the first period, which ended 8-3 in favour of Manchester! Things calmed down somewhat after that - the game ended in a 13-5 Manchester win.