Leaders Manchester Thunder earned a narrow win over Yorkshire Jets to maintain their unbeaten run this term.
The Jets proved a stern test for the reigning champions in Friday's first half and finished only a point behind in both quarters.
But Thunder pulled ahead after the break and came out 54-51 winners.
There were also wins for Hertfordshire Mavericks and Surrey Storm and Loughborough Lightning in round four.
The Mavericks inflicted a third defeat on Team Bath, winning 51-34 on Friday night, while Surrey overcame bottom club Celtic Dragons 66-49 on Saturday.
Lightning made it back-to-back victories after beating Team Northumbria 57-48 on Monday.
It meant Manchester finished the latest round of games three points clear at the top of the standings.
Thunder's player of the match Helen Housby, who netted 100% of her shots against the Jets, said after the game: "I am so pleased with that.
"There's always things I can improve, I think today I got a little bit stuck on the baseline so I will look to work on that.
"It is always tough coming to Leeds and credit to the girls for holding on as it would have been easy to step off the gas but we dug deep."
|Superleague 2015 - Round four|
|13 Feb - Team Bath 34-51 Hertfordshire Mavericks||13 Feb - Yorkshire Jets 51-54 Manchester Thunder|
|14 Feb - Surrey Storm 66-49 Celtic Dragons||16 Feb - Team Northumbria 48-57 Loughborough Lightning|