Everton have been chasing the central defender this summer.
The Blues are looking to add another striker to their squad as competition for Romelu Lukaku.
Everton failed to win in the Premier League on Saturday.
The defender has been linked with an exit from Arsenal all summer.
The Italian side are keen on the West Ham United midfielder.
Spurs kicked off their campaign with a trip to Everton on Saturday. How did their players start the season against Koeman's new side?
Despite a late scare from Jermain Defoe, Pep Guardiola would have been encouraged by his new side's performance.
The Sheffield Wednesday star has been linked with a move to Newcastle United and Derby County.
The 20-year-old American forward made his first start for the club in Saturday's 2-1 loss at Manchester City.
On 14 August 1996, a 20-year-old midfielder called Patrick Vieira signed for Arsenal from AC Milan for £3.5 million.
Victor Moses netted the winner for Chelsea against Tottenham at the weekend.
Robbie Savage gives his view that Manchester United were simply too wasteful.
A list no firm wants to be on!
David Gold has offered updates on West Ham United's Diafra Sakho and Andy Carroll.
Celtic's Moussa Dembele is reportedly on West Ham United's radar
Leeds' chances of causing a shock at Anfield have just increased.
The Tottenham Hotspur youngster will surely not do any worse than the Austrian international.
Aston Villa's Rudy Gestede is a reported transfer target for West Bromwich Albion.
Alan Shearer has criticised Eric Dier, Dele Alli and Christian Eriksen for their performances this season.
Fernando Llorente is now at Swansea City but was once wanted by Tottenham Hotspur.