Middlesex appoint former Hampshire wicketkeeper Nic Pothas as their assistant coach.
Daryl Mitchell warns there must be a clear divide between English counties and the new city-based teams in The Hundred.
Former South Africa batsman AB de Villiers will play for Middlesex in this summer's T20 Blast - his first stint in county cricket.
Middlesex sign 17-year-old Afghanistan spinner Mujeeb Ur Rahman for the entirety of the 2019 Twenty20 Blast campaign.
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Rob Franks had been playing for Hampshire when doctors noticed a tumour on his left knee.
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How to get into cricket
How to get into cricket - physical exertion with a chess-like element in matches which range from half an hour to five days.