The 2009–10 season was the 121st season of competitive football by Celtic. Celtic started their 2009–10 campaign by playing in the pre-season Wembley Cup. Their first competitive game of the season was at Celtic Park on 29 July where they were beaten 1–0 by Dynamo Moscow in the 1st leg of the Champions League third-qualifying round for best placed teams. However, in the return leg at Dynamo Stadium on 5 August, Celtic won 2–0 (2–1 on aggregate) thanks to a 44th-minute goal by Scott McDonald and a late injury-time strike from Georgios Samaras, giving Celtic a first away win in Europe since their 1–0 win over MTK Hungaria at Stadium Puskás Ferenc in 2003. The win took Celtic through to the Champions League play-off round, where they lost to Arsenal.