The Giants fought hard but fell to a third successive defeat at the start of the new BBL season.
Yorick Williams and his men will try again on Sunday as they look for their first victory.
Cheshire Phoenix are in town for a BBL Cup clash and Williams will take some encouragement from a better showing against the Sharks.
The Giants pushed their old rivals all the way with the home team leading 22-17 after a quarter and 39-30 up at the break.
The Giants narrowed the deficit to a point in the third but the home team pulled away again in the third and went into the fourth 59-47 up.
Callum Jones led the way with 22 points with Jerelle Okoro on 16, Donatas Visockis on 16 and Williams on 11.
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