Exhibit31.1

CERTIFICATION

I, David J. Vogel, certifythat:

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

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| 2.  | Based on my knowledge, this reportdoes not contain any untrue statement of a material fact or omit tostate a material fact necessary to make the statements made, in lightof the circumstances under which such statements were made, notmisleading with 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 othercertifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in ExchangeAct Rules 13a-15(e) and 15d-15(e)) for the registrant and have: |

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|  | a)  | designed such disclosure controlsand procedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material informationrelating to the registrant, including its consolidated subsidiaries, ismade known to us by others within those entities, particularly duringthe period in which this report is being prepared; |

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|  | b)  | evaluated the effectiveness of theregistrant's disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by thisreport based on such evaluation; and |

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|  | c)  | disclosed in this report anychange in the registrant's internal control over financialreporting that occurred during the registrant's most recentfiscal quarter (the registrant's fourth fiscal quarter in thecase of an annual report) that has materially affected, or isreasonably likely to materially affect, the registrant's internalcontrol over financial reporting; and |

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| 5.  | The registrant's othercertifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to theregistrant's auditors and the audit committee of theregistrant'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. |

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| Date:  |  | March29, 2006 |  | /s/ David J.Vogel                                                 |
|        |  |          |  | DavidJ. Vogel Citigroup Managed Futures LLC President andDirector |
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