Smith Barney Futures Management LLC 388 Greenwich Street, 7th Floor New York, New York 10013-2396 May 31, 2000 Campbell & Company, Inc. Court Tower Building, Towson 210 West Pennsylvania Avenue Suite 770 Baltimore, MD 212104 Attn: Mrs. Theresa D....

                       Xxxxx Xxxxxx Futures Management LLC
                         000 Xxxxxxxxx Xxxxxx, 0xx Xxxxx
                          Xxx Xxxx, Xxx Xxxx 00000-0000






May 31, 2000



Xxxxxxxx & Company, Inc.
Court Tower Building, Towson
000 Xxxx Xxxxxxxxxxxx Xxxxxx
Xxxxx 000
Xxxxxxxxx, XX 000000


Attn: Xxx. Xxxxxxx X. Xxxxx

         Re:      Management Agreement Renewals

Dear Xxx. Xxxxx:

We are  writing  with  respect  to your  management  agreements  concerning  the
commodity pools to which reference is made below (the "Management  Agreements").
We are extending the term of the Management  Agreements through June 30, 2001and
all other provisions of the Management Agreements will remain unchanged.

                       Xxxxx Xxxxxx Potomac Futures  Fund L.P.
                       Xxxxx Xxxxxx Diversified Futures Fund L.P.
                       Xxxxx Xxxxxx Global Markets Futures Fund
                       Xxxxx Xxxxxx Diversified Futures Fund X.X. XX
                       Xxxxx Xxxxxx Xxxxxxxx X.X. and Energy Fund plc
                       Xxxxx Xxxxxx Global Diversified Futures Fund L.P.
                       Xxxxx Xxxxxx Diversified 2000 Futures Fund L.P.



Please  acknowledge  receipt of this  modification  by signing  one copy of this
letter and returning it to the  attention of Xx. Xxxxxx  Xxxxxxxx at the address
above or fax to  000-000-0000.  If you have any  questions  I can be  reached at
000-000-0000.

Very truly yours,

XXXXX XXXXXX FUTURES MANAGEMENT LLC


By:
         Xxxxxx X. Xxxxxxxx
         Chief Financial Officer,
         Director & Treasurer

AGREED AND ACCEPTED

XXXXXXXX & COMPANY, INC.



DAD/sr