Britain's biggest retailer Tesco will have to wait until October before its new boss can start, it said on Monday.
Tesco said in October last year that Chief Executive Dave Lewis was stepping down in the summer of 2020 after six years in the top job and will be succeeded by Ken Murphy.
No start date was given at the time.
It said on Monday that Murphy will start as CEO on 1 October, after fully respecting his contractual commitments, including non-compete obligations, to previous employer Walgreens Boots Alliance.
Tesco said Lewis has agreed to extend his tenure until 30 September so as to facilitate "a smooth and seamless handover".