Munster were drawn in Pool 3 of the
Heineken Cup alongside the
Ospreys,
London Irish and
RC Toulon. Munster lost 23–17 away to London Irish, before defeating RC Toulon 45–18 at Thomond Park on 16 October 2010. Munster defeated Ospreys 22–16, but lost the reverse fixture at Liberty Stadium 19–15. In round 5 Munster went to RC Toulon, losing 32–16. As a result of this defeat, Munster failed to qualify for the quarter-finals of the Heineken Cup for the first time in 13 years. As one of the top three runners up in the Heineken cup pool stage, Munster entered the quarter-final stage of the
Challenge Cup where they defeated
Brive 42–37 in France before losing at home 12–20 to
Harlequins. In the
Magners league Munster finished top of the table with nineteen wins and three defeats after twenty two matches to qualify for the semi-final playoffs where they defeated
Ospreys 18–11. They then played in the
2011 Celtic League Grand Final where they defeated
Leinster by 19 points to 9 to claim their third league title. ==2010-11 Playing Squad==