Celtic face Hearts this weekend as the title race enters the final four fixtures of the season. Squeezing past Dundee at the weekend, Brendan Rodgers now has two home games that, if Celtic win them, will effectively tie up the league title. Beating Hearts on Saturday and then Rangers the following weekend will take Celtic a minimum of six points clear at the top of the Scottish Premiership (assuming the Ibrox club avoid another slip-up) and barring a complete collapse, the league trophy will remain within the Parkhead boardroom. But with Celtic struggling to capture the form that helped them r…