Andy Halliday believes the Scottish football public are waiting for former club Hearts to "slip up" after the Premiership leaders came through a stern test at Dundee.
Claudio Braga's goal and stunning late save by his replacement Craig Gordon secured a 1-0 win for Hearts at Dundee on Sunday, despite goalkeeper Alexander Schwolow's first-half red card.
"Everyone's waiting for Hearts to slip up," Halliday told the BBC’s Scottish Football Podcast.
"When Hearts go down to 10 men in the first half, I think that was the moment. Everyone was expecting, well, here we go. This is going to be a real challenge for them.
"That being said, obviously another chapter into Hearts this season with the return of Craig Gordon and obviously the save he makes at end of the game. We are talking about how important these results and performances can be."
Halliday also turned out for Rangers and the Ibrox side churned out a second straight 2-0 win over Aberdeen later on Sunday. Danny Rohl's side trail Hearts by three points though Derek McInnes' league leaders have a game in hand at home to St Mirren to play on Wednesday evening.
"Danny Rohl's got a tune out of Rangers, so everyone's expecting them to carry momentum forward and really push Hearts," said Halliday.
"I still feel that Rangers have to be extremely active from now to the end of this transfer window to bring in two, three immediate starters and guys that can affect the game at the top end of the pitch, especially in open play."
