To prepare for the Season, Celtic took part in two Pre-Season Tournaments; the Algarve Challenge Cup in Faro, Portugal, where they finished bottom, having faced Middlesbrough and Cardiff City, and the Feyenoord Jubilee Tournament in Rotterdam, where they finished second, having faced Tottenham Hotspur and host club Feyenoord.

This lead was squandered though, Celtic dropping points to Dundee United, Inverness Caledonian Thistle, Motherwell, Rangers themselves, and on two occasions to both Hibernian and Hearts.

A disappointing 2–1 defeat to Aalborg in Denmark saw Celtic's European aspirations end, despite having taken the lead through Barry Robson.

The team won the 2009 Scottish League Cup Final 2–0 aet at Hampden, with Darren O'Dea and Aiden McGeady getting the goals.

Win Draw Loss Postponed List of squad players, including number of appearances by competition