Steven Naismith was left frustrated by Alex Cochrane's sending off against Celtic as the Hearts boss admitted his side are now facing two of their biggest games of the season.
The Jambos' hopes of a third place finish for the second straight season rest on their upcoming fixtures against St Mirren and Aberdeen, with the trip to Paisley now set to see Cochrane miss out after his dismissal at Tynecastle.
A pull back on Daizen Maeda initially saw the defender cautioned by referee Nick Walsh, but after a VAR review his yellow card was upgraded to a red for denying a clear goalscoring opportunity.
