<h1>League leader wins in four sets to clinch top regular-season spot, semi-finals set for tomorrow</h1> A professional volleyball match concluded with the league-leading side defeating its opponent in four sets, securing first place in the regular-season standings and setting the semi-final matchups: first vs fourth and second vs third, scheduled for the following day. The report details in-match tactical shifts, substitutions, and pivotal plays that determined the outcome. The item is a press release distributed via a news agency under an arrangement disclaiming editorial responsibility by the aggregator.