Exhibit31.1

CERTIFICATION

I, David J. Vogel, certifythat:

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| 1.  | I have reviewed this quarterlyreport on Form 10-Q of Smith Barney Potomac Futures Fund L.P. (the"registrant"); |

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| 2.  | Based on my knowledge, this report does notcontain any untrue statement of a material fact or omit to state amaterial fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleadingwith respect to the period covered by this report; |

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| 3.  | Based on my knowledge, the financialstatements, and other financial information included in this report,fairly present in all material respects the financial condition,results of operations and cash flows of the registrant as of, and for,the periods presented in this report; |

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| 4.  | The registrant's other certifyingofficer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules13a-15(e) and 15d-15(e)) and internal control over financial reporting(as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for theregistrant and have: |

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| a)  | designedsuch disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensurethat material information relating to the registrant, including itsconsolidated subsidiaries, is made known to us by others within thoseentities, particularly during the period in which this report is beingprepared; |

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| b)  | designed suchinternal control over financial reporting, or caused such internalcontrol over financial reporting to be designed under our supervision,to provide reasonable assurance regarding the reliability of financialreporting and the preparation of financial statements for externalpurposes in accordance with generally accepted accountingprinciples; |

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| c)  | evaluated theeffectiveness of the registrant's disclosure controls andprocedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the endof the period covered by this report based on such evaluation; and |

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| d)  | disclosed in this report anychange in the registrant's internal control over financialreporting that occurred during the registrant's most recentfiscal quarter that has materially affected, or is reasonably likely tomaterially affect, the registrant's internal control overfinancial reporting; and |

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| 5.  | Theregistrant's other certifying officer and I have disclosed, basedon our most recent evaluation of internal control over financialreporting, to the registrant's auditors and the audit committeeof the registrant's board of directors (or persons performing theequivalent functions): |

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| a)  | allsignificant deficiencies and material weaknesses in the design oroperation of internal control over financial reporting which arereasonably likely to adversely affect the registrant's ability torecord, process, summarize and report financial information; and |

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| b)  | any fraud, whether or notmaterial, that involves management or other employees who have asignificant role in the registrant's internal control overfinancial reporting. |

Date: August 9, 2005

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|   |  | /s/David J.Vogel                                     |
|   |  | DavidJ. Vogel Citigroup Managed Futures LLC President andDirector                                                                                                                                                                        |
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