2002–03 was a successful season for Rangers, who won a domestic treble. They and Celtic competed in a very closely fought title race. Rangers were five points clear of Celtic at the time of the split, but a Celtic victory in the Old Firm derby and Rangers dropping further points against Dundee in the following match left the rivals level on points and on goal difference going into the final day of the season; Rangers were only ahead having scored 95 goals to Celtic's 94. On the final day, Rangers beat Dunfermline Athletic 6–1 at Ibrox Stadium while Celtic could only win 4–0 at Kilmarnock, meaning Rangers won the title by a goal difference of one more than Celtic (a stoppage-time penalty made the outcome more secure for Rangers – they would still have won at 5–1 by the margin of two more goals scored, but until that point Celtic would have claimed the title by goal difference had they scored again). This was the closest finish in the history of the SPL. Celtic striker Chris Sutton sparked controversy by accusing the Dunfermline players of "lying down" to allow Rangers to win the title, a comment which sparked a furious response and the threat of legal action from Dunfermline. Celtic had a more successful season in Europe, reaching the 2003 UEFA Cup Final, but eventually lost to Porto after extra-time in Seville, just four days before the final match of the league season. However, it would ultimately be the first season of Martin O'Neill's reign which ended without a trophy for Celtic.