(CNN) -- A late Paul Quinn equalizer gave Motherwell a 1-1 home draw against Celtic on Sunday, a result that prevents the champions from going back to the top of the Scottish Premier League table at the expense of Glasgow rivals Rangers.
Celtic took the lead in the 59th minute when Australian striker Scott McDonald's shot from the edge of the area appeared to bobble over the leg of goalkeeper Graeme Smith for his 13th goal of the season.
However, nine minutes from time, Quinn levelled from 12 yards out with a left-foot drive after the Celtic defense failed to deal with a Jim O'Brien cross.
Rangers remain top of the table on goal difference as Celtic now look to address their poor recent form which has seen them win just once in their last six league games.
Walter Smith's Rangers side went top of the table on Saturday after coming from behind to beat Kilmarnock 3-1, courtesy of a double from Kenny Miller.