((Today's game starts 1600. Draw due at 2015))
Rangers eased to a 4-1 win at Dumbarton to ensure they'll be in this evening's draw for the fifth round of the Scottish Cup.
Hearts survived a scare as they needed a stoppage time goal to edge fourth-tier Spartans 2-1 to progress.
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Bonnyrigg Rose produced one of the biggest upsets of the fourth round as they also scored a late winner to knock out League One leaders Falkirk by the same score.
Holders Celtic's defence starts at home to Buckie Thistle this afternoon.
