Tottenham Hotspur have already strengthened their squad this summer, but where else does their squad need improving?

Transfers done so far...

With the conclusion of the European Championships just two weeks ago, Spurs have managed to secure two signings with a few weeks left until the start of the Premier League season. Firstly, as soon as the window opened Mauricio Pochettino set-up a reunion with midfielder Victor Wanyama, who he'd bought for Southampton three years earlier.

The Kenyan signed a five-year deal at the end of June, worth a fee in the region of £11 million. The second capture for Spurs in this window was somewhat of a saga as after numerous bids being turned down and the player's price inflating, Pochettino eventually got his man with Dutch striker Vincent Janssen signing for £18 million on July 12 from AZ Alkmaar.

Janssen may not be the only striker to come

Despite the time, effort and more money than first thought it took to get striker Janssen's signature, Spurs may need to bring in another out and out forward before the window closes at the start of September. Given the hype around him, you'd think that the Argentine manager may look to get him in the same team as Harry Kane.

Therefore no matter what actual role the Netherlands international has in the team, Pochettino is likely to be playing both the main strikers in his squad for most games with Spurs set for their return to the Champions League this season. With this in mind, another quality centre-forward would be ideal for Spurs so they could not only switch up personnel, but also tactics.

Forward candidates?

In light of the long pursuit for Janssen, Spurs have not been linked with many other strikers, but rumours from Italy have broken out this week that Inter Milan forward Mauro Icardi's representatives have received contact from both Spurs and their North London rivals Arsenal about the 23-year-old who has scored 57 goals in Serie A.

However a proven goalscorer closer to home has caught the attention of many this week, with West Bromwich Albion's Saido Berahino turned down another contract extension earlier this month. Berahino has been a long time target for Spurs who had numerous bids knocked back for him late in the January transfer window, but the Baggies played hard ball then and would most likely sell elsewhere now after the winter issues with Spurs pursuit of the English striker.

A creative midfielder perhaps?

This may seem a strange need for Spurs due to the fact they have Christian Eriksen who is one of the best attacking midfielders in the Premier League, if not all of European football. However it is a similar situation to the striker position in terms of building quality in depth for the squad, as they try and make themselves a consistent top four outfit, if not title contender.

Defence also needs options

A final area of the squad Tottenham should be looking to strengthen before the season starts is in central defence. For the exact same reasons as the other mentioned positions, with one injury making this area of the squad look a lot weaker than it appears to be.

Jan Vertoghen and last summer's big signing Toby Alderweireld formed a great partnership last season, but if one of these two went missing for whatever reason, there is only really Kevin Wimmer as a back-up centre-back. Also with the return to the Champions League, Spurs need to become less predictable in defence as well as attack.

Unlike the other positions mentioned, it appears right now at least that Spurs don't feel the need to actively pursue another central defender. However. there are certainly some high quality options who could well be on the market this summer. Jonathan Tah is certainly one of those who plays for Bayer Leverkusen, although only 20-years-old he was impressive in the Bundesliga last season.

Spurs already have a strong English connection at the club and they could well add to that in their defence, with John Stones being a likely option, as he still looks for a move away from Everton, Spurs would face stiff competition in order to land him though with Chelsea trying and failing to sign him last year and Manchester City reportedly interested for this campaign. 

Whoever Tottenham decide to try and sign, it's a race against time to get them into the club before the new Premier League season starts in three weeks.