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1999–2000 LEN Champions League
League	LEN Champions League
Sport	Water Polo
Duration	27 October 1999 to 27 May 2000
Number of teams	8 (preliminary round) 28 (total)
Final Four
Finals champions	Bečej (1st title)
Runners-up	Mladost
Champions League seasons
← 1998–99 2000–01 →

The 1999–2000 LEN Champions League was the 37th edition of LEN's premier competition for men's water polo clubs. It ran from 27 October 1999 to 27 May 2000, and it was contested by 28 teams. The Final Four (semifinals, final, and third place game) took place on May 26 and May 27 in Bečej.

BVSC

POŠK

Olympiacos

Nice

Bečej

Mladost

Spartak

Spandau

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Location of teams of the 1999–00 LEN Champions League group stage.
Blue Group; Red Group.

Team	Pld	W	D	L	GF	GA	GD	Pts
BVSC	6	3	3	0	41	34	+7	9
POŠK	6	4	1	1	51	37	+14	9
Olympiacos	6	2	2	2	45	44	+1	6
Olympic Nice	6	0	0	6	36	58	−22	0

Team	Pld	W	D	L	GF	GA	GD	Pts
Bečej	6	5	1	0	61	34	+27	11
HAVK Mladost	6	3	0	3	40	39	+1	6
Spartak Volgograd	6	2	0	4	40	53	−13	4
Spandau 04	6	1	1	4	36	51	−15	3

Semifinals 26 May 2000 Final 27 May 2000                       BVSC 4       HAVK Mladost 6   HAVK Mladost 8       Bečej 11   Bečej 6     POŠK 4   Third place           BVSC 13     POŠK 7 Final standings Team Bečej HAVK Mladost BVSC POŠK

1999–2000 Champions League Champions  Bečej 1st title Aleksandar Šoštar, Predrag Zimonjić, Slobodan Soro, Goran Krstonošić, Nenad Vukanić, Branko Peković, Aleksandar Ćirić, Veljko Uskoković, László Tóth, Aleksandar Šapić, Jugoslav Vasović, Balázs Vincze, Nebojša Milić Head coach Zoltán Kásás

• 1999–00 LEN Cup Winners' Cup
• 1999–00 LEN Cup