EX-99.906CERT

FORM N-CSR ITEM 10(B) EXHIBIT

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

            The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of Senior Debt Portfolio (the "Portfolio"), that:

   (a)   the Semi-Annual Report of the Portfolio on Form N-CSR for the period
         ended May 31, 2003 (the "Report") fully complies with the requirements
         of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
         amended; and

   (b)   the information contained in the Report fairly presents, in all
         material respects, the financial condition and the results of
         operations of the Portfolio for such period.

A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE PORTFOLIO AND WILL BE RETAINED BY THE PORTFOLIO AND FURNISHED TO
THE SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.

Date: July 15, 2003
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/s/ BARBARA E. CAMPBELL
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Barbara E. Campbell
Treasurer

Date: July 15, 2003
      -------------------


/s/ SCOTT H. PAGE
- -------------------------
Scott H. Page
President