GLASGOW, Dec 30 (Reuters) - Champions Celtic drew 1-1 at Motherwell on Saturday after conceding a stoppage-time goal by Darren Lee Smith in their Scottish Premier League (SPL) clash.
Celtic's Derek Riordan pounced in the first half after Motherwell keeper Graeme Smith had pushed away a shot from Japanese midfielder Shunsuke Nakamura on 36 minutes and he angled in a six-metre shot from the right.
Smith rattled a close-range shot beyond keeper Artur Boruc in stoppage time, moments after Thomas Gravesen had struck the right post with a 20-metre shot.
Elsewhere, Rangers were booed off after stumbling to a 1-1 draw at home to lowly St Mirren as the pressure grew on under-fire manager Paul Le Guen, who took over during the close season.
Asked if the job was more difficult than he first thought, Le Guen told BBC radio: 'Yes...because we are not lucky. But it is my job to cope with difficult situations and it is my responsibility.
'We will try to find a solution but it is not easy.'
St Mirren took a first-half lead with a Richard Brittain shot from 20 metres into the bottom right, but Rangers striker Kris Boyd headed the equaliser five minutes later from a cross by Charlie Adam.
Aberdeen crashed to a 3-1 defeat at Dundee United and had Richie Hart sent off on 65 minutes for a second bookable offence.
Celtic top the SPL standings with 53 points from 22 games, while Aberdeen remain second with 37 points and Rangers third a point behind.