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Tennis star Serena Williams joins ex-Teneo boss Declan Kelly at Consello

Kelly, brother of former Labour Party leader Alan, founded Consello after his controversial exit from global firm Teneo

Tennis superstar Serena Williams has joined Declan Kelly’s firm as an adviser

Consello Group, a newly formed investment banking firm that has been on a hiring spree since forming last year, added longtime Citigroup Inc. executive Mark Shafir and tennis star Serena Williams to its ranks.

Shafir, who was most recently co-head of global mergers and acquisitions at Citigroup, will join New York-based Consello as managing partner of the company’s M&A advisory and investment-banking business, according to a statement. Williams, a 23-time Grand Slam champion and venture ...