Aberdeen moved level on points with Celtic atop the Scottish Premiership as they were held to a 0-0 draw by Partick Thistle on Wednesday.
Derek McInnes' side were handed the chance to become outright leaders after Celtic's clash at Dundee was postponed due to a waterlogged pitch, but they could only claim a point at Pittodrie.
Led by Adam Rooney, Aberdeen went close to breaking the deadlock on a number of occasions but were left frustrated as a resolute Partick held on to extend their unbeaten run to six games.
Third-placed Hearts closed the gap to the top two after a thrilling opening 45 minutes against Dundee United at Tynecastle brought five goals in their 3-2 win.
Gavin Reilly, Prince Buaben and Osman Sow found the back of the net for Hearts as they went into the break 3-2 ahead, while United were reduced to 10 after Mark Durnan's dismissal.
Neither side was able to add to their tally after the break, giving Hearts a return to winning ways after five without success as they moved to within seven points of the top two.
Inverness Caledonian Thistle moved into the top half in a thrilling encounter with Hamilton, Liam Polworth firing home three minutes into injury time to complete a 4-3 triumph.
Motherwell remain a point behind Inverness after beating fourth-placed St. Johnstone 2-0 at Fir Park thanks to Ben Hall and Stephen Pearson.
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