Exhibit 99.1
                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Salomon Smith Barney Global Diversified
Futures Fund L.P. (the "Partnership") on Form 10-K for the year ending December
31, 2002 as filed with the Securities and Exchange Commission on the date hereof
(the "Report"), I, David J. Vogel, President of Smith Barney Futures Management
LLC, certify, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of
the Sarbanes-Oxley Act of 2002, that:
          (1) The Report fully complies with the requirements of section 13(a)
or 15(d) of the Securities Exchange Act of 1934; and
          (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Partnership.

/s/ David J. Vogel
    David J. Vogel
    Smith Barney Futures Management LLC
    Chief Executive Officer
    March 27, 2003