Celtic and Rangers are playing leapfrog as their schedule of games to catch up with the rest of the SPL plays out. Full-back Mark Wilson expects some surprises along the way of the SPL race following Dundee United's win at Ibrox. However, he is keen to avoid an "unbearable'' final-day shoot-out. Rangers missed their chance to go top of the table on Saturday when David Goodwillie scored a last-gasp winner against Rangers. However, the Ibrox side made sure of sitting on top of the table for a while at least when they beat St Johnstone in last night's 6pm kick-off game in Perth. Celtic now play their game in hand hosting Hibs tonight and could leapfrog their old rivals once again. But Wilson anticipates the tight schedule of games and pitches battered by the harsh winter to play their part in the run-in and he does not expect to stretch clear of their Old Firm rivals. However, the Scotland international does want the championship safely wrapped up before the final weekend of the season. Looking back at Dundee United's win over Rangers, Wilson said: "It was obviously a good result for us. We were actually on the training pitch so we didn't know much about it until later on. It's a good feeling when unexpected things like that happen. But I think there are going to be slip-ups from both teams and that was the first one from Rangers. I hope we can go on a good run where we don't lose games but it's going to be very difficult with the number of games and especially the situation with some pitches the way they are just now, it's tough. The pitches haven't been great, that's not the clubs' fault, it's the weather conditions. Our training pitch has been ripped up now. The obvious place, we found it very difficult at Motherwell. We didn't play well that day and didn't deserve anything but it was a very difficult surface. St Johnstone's pitch wasn't great earlier in the season and you've seen the problems with Inverness with games being called off. I'm sure all these factors will add up, but not just for ourselves, for Rangers, Hearts and other teams who are chasing to get in the top six and avoid relegation.'' When asked if he was prepared for the title race coming down to the last game of the season, the former Dundee United player said: "No chance, I want it wrapped up before then. That would just be a nightmare because it's pretty tense as it is, so to boil down to the last day of the season would be pretty unbearable. You never know, you wouldn't say Rangers would lose at home against Dundee United and I'm hoping we win against Hibernian, but who knows what could happen? There will be slip-ups along the way and let's just hope it doesn't go down to the last day.''