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The 2010–11 Men's LEN Trophy was the second tier of European competition in water polo. It ran from October 2010 to April 2011.
Federation team allocation
Each national federation can enter up to two teams into the LEN Trophy. 16 additional teams eliminated from the qualifying rounds of the 2010/11 Euroleague are transferred to the Men's LEN Trophy.
Distribution
Teams entering in this round
Teams advancing from previous round
Teams transferred from Euroleague
First Qualifying Round
1 or 2 teams from each federation
Second Qualifying Round (32 teams)
4 tournament winners from the first qualifying round
4 tournament runners-up from the first qualifying round
4 tournament third-placed teams from the first qualifying round
4 tournament fourth-placed teams from the first qualifying round
4 tournament third-placed teams from the first qualifying round
4 tournament fourth-placed teams from the first qualifying round
4 tournament third-placed teams from the second qualifying round
4 tournament fourth-placed teams from the second qualifying round
Knockout Phase (16 teams)
8 tournament winners from the second qualifying round
8 tournament runners-up from the second qualifying round