Eric Bailly (£30m):
Not many knew who Eric Bailly was until Jose Mourinho decided to sign him for Manchester United last summer. A fee of £30m was paid to sign the Ivorian from Villarreal, and while everyone doubted the capabilities of Bailly, the Ivorian has proven last season that he is a beast at the back and is also versatile as he can play both at the center back and the right back.
Javi Martinez (£34m):
Javi Martinez is one of the underrated players in a star-studded squad of the German giants Bayern Munich. He was signed five years back, and the Spaniard has played a key role for the Bavarians but has struggled with a lot of injuries time and again.
Shkodran Mustafi (£34.85m):
Many were surprised when Arsene Wenger spent £34.85 million on Mustafi to bring him to Arsenal. Signed from Valencia, Mustafi has had a mixed season for the Gunners. The 25-year-old still has time on his hands to improve and prove his worth to both Wenger and the Arsenal fans.
Lilian Thuram (£35.28m):
Thuram is surely one of the finest defenders ever to play the game. He played a key role in helping France win the 1998 World Cup and the Euros 2000. It was those performances that tempted Juventus to sign the Frenchman for £35m in 2001.
Thiago Silva (£35.7m):
The Brazilian has been a rock for Paris Saint Germain for the past few years since joining them in 2012. He is more than a defender. He is a leader on the pitch and a commander at the back. Looking back at the £35.7m paid for him, the PSG owners wouldn’t have anything to regret about.
Nicolas Otamendi (£37.91m):
Manchester City have paid a hefty amount of money to sign players and especially when it has come to defenders, they sure have spent a lot. Argentine Otamendi is one of those signings when signed from Valencia. It is safe to say that Otamendi hasn’t been able to establish himself as strongly as one would expect, but City would rely on him time and again to make the difference.
Rio Ferdinand (£39.10m):
It stunned many as Sir Alex Ferguson spent more than £39m to sign a defender in 2002 which was a huge amount of money then. Rio joined United from Leeds, and one can say it was one hell of a signing by the Scottish manager as Rio went on to become of the best English defenders of all time playing for United.
David Luiz (£42.08m):
David Luiz is surely not one of the most consistent defenders and may be that was the reason he was sold to Paris Saint Germain some years back. A massive amount of £42.08m was received from Chelsea in the process, and it is amazing how they have signed the same player from PSG, who helped them win the title last season.
John Stones (£47.26m):
John Stones is arguably one of the hottest young prospects in English football. He was amazing at Everton which prompted Pep Guardiola to sign him for Manchester City last summer. Given the competition he had to sign him, City had to pay a lot, and it is expected from Stones that he will show his worth in the coming years.
Kyle Walker (£48.03m):
This is one of the most shocking transfers given the amount involved in the transfer. Kyle Walker was good last season with Spurs, but no one expected Manchester City to spend this much amount of money for a right back. Given that City missed out on signing Dani Alves this summer, the transfer does look like a bit desperate but only time can tell how worthy it will be.