Kyle Walker will become the most expensive defender in the world when he joins Manchester City on Friday in a deal worth £54 million.

Walker will have a medical on Friday to seal the deal, which also breaks John Stones’s £47.5m transfer record for an English player.

City will pay Tottenham an initial £45million plus £5m in payments across 12 months, with a further £4m based on performances. If any of those bonuses are met, it will break David Luiz’s £50m record as the most expensive defender.

Kyle Walker is set to join Manchester City after they agreed a fee rising to £50m with Spurs

WALKER FACTFILE Club career: Sheffield United (2008-09) - 7 games Northampton (2008)* - 9 games Tottenham (2009-) - 228 games, 4 goals Sheffield United (2009-10)* - 28 games QPR (2010)* - 20 games Aston Villa (2011)* - 18 games, 2 goals TOTAL: 302 games, 6 goals International career: England (2011-) - 27 caps Advertisement

Walker’s former club Sheffield United are also due around £5m from a sell-on clause which gave them 10 per cent of the fee of his next transfer.

City and Tottenham had been £10m apart in their valuation but City accelerated talks after missing out on back-up Dani Alves, who snubbed their advances in favour of joining Paris Saint-Germain.

Pep Guardiola had identified Walker as his main target at right back after allowing Pablo Zabaleta and Bacary Sagna to leave.

Walker, 27, who will sign a five-year deal, is expected to go on tour with City on Monday and could line up against Spurs in the International Champions Cup in Nashville, Tennessee, on July 29.

Walker has emerged as one of the best attacking right backs in European football

HIGHEST TRANSFER FEES FOR DEFENDERS David Luiz, Chelsea to PSG, £50m John Stones, Everton to Man City, £47.5m Shkodran Mustafi, Valencia to Arsenal, £35m David Luiz, PSG to Chelsea, £34m Thiago Silva, AC Milan to PSG, £33m Advertisement

He played 39 times for Spurs last season but manager Mauricio Pochettino was happy to let him go after a strong end to the season from Kieran Trippier, who has since been handed a five-year contract.

City will now turn their efforts to adding more full backs, with talks developing over Monaco’s Benjamin Mendy and Southampton’s Ryan Bertrand.

Tottenham are considering Benjamin Henrichs of Bayer Leverkusen, Lyon’s Rafael, Ricardo Pereira of Porto and Adam Smith of Bournemouth as they look to move quickly to replace Walker.

City are still hopeful of signing left back Benjamin Mendy (centre) from Monaco

In the past, Spurs have waited until the latter stages of the summer transfer window before making moves for players, but, with the season starting in less than five weeks, Pochettino wants to wrap up deals early and avoid the uncertainty.

In that mind, Juan Sebastian Veron was in London on Thursday to finalise the transfer of Juan Foyth from Estudiantes.

Veron, the former Chelsea and Manchester United midfielder, now president of Estudiantes, is friends with Pochettino and hopes to conclude a £9m deal for the Argentina Under 20 international.

Foyth is comfortable at centre back - in both a three and four-man defence - and has also been used in midfield.