Clifford Chance (CC) and Cleary Gottlieb Steen & Hamilton have won key advisory roles on one of the world’s biggest potential takeovers – Brazilian mining company Vale’s approach to Swiss rival Xstrata for an estimated $90bn (£44.9bn).

If the deal goes ahead it would see Vale threatening BHP Billiton’s position as the world’s largest mining company. CC has won the lead role for Vale, with the magic circle firm fielding a team led by Sao Paulo-based relationship partner Anthony Oldfield and London-based corporate partner David Pudge.