Tottenham Hotspur have recorded back-to-back 17th-place finishes in the Premier League. If they want to return to the top half of the table, they need to spend wisely this summer.Spurs tried to be ambitious in the transfer window last year but failed to complete deals for Antoine Semenyo, Morgan Gibbs-White and Eberechi Eze. Mohammed Kudus and Xavi Simons arrived for a lot of money, but both missed a significant amount of game time through injury.Roberto De Zerbi joined Spurs in March with the sole aim of preserving their top-flight status. The Italian led them to safety by taking 11 points out of a possible 21 from their final seven games. Following their 1-0 victory against Everton on the last day of the season, De Zerbi made it clear that the squad needs significant investment.“From tonight, we have to start to organise and to build a new team,” De Zerbi said. “We have now to change too many players. We have 10, 11, 12 players good enough to stay… And then we have to complete the squad with the first level of players.”Here, The Athletic breaks down what to expect from a busy summer.The information found within this article has been gathered according to The Athletic’s sourcing guidelines. Sources with knowledge of transfer dealings, who asked to be kept anonymous to protect relationships, have been spoken to before offering the clubs involved the opportunity to comment.Who will make key decisions this window?This will be Tottenham’s first summer transfer window in 25 years without Daniel Levy running the show. The club’s former chairman often handled negotiations with other teams but he was removed from his role in September by the majority shareholders, the Lewis family.It means the responsibility and pressure will fall on chief executive officer Vinai Venkatesham, sporting director Johan Lange and head of scouting Rob Mackenzie to deliver what De Zerbi wants.Spurs’ recruitment team will be completed by a new co-sporting director. The new hire will replace Fabio Paratici, who left at the end of the winter transfer window. The Athletic reported in April that former Borussia Dortmund sporting director Sebastian Kehl was the leading contender, but nothing has been confirmed yet.What positions will they be looking at in the summer window?Spurs want to provide Micky van de Ven with competition and cover at left-sided centre-back, and this will be addressed with the impending arrival of Marcos Senesi from Bournemouth.Spurs are progressing with a deal for departing Liverpool left-back Andy Robertson, who will give De Zerbi a natural alternative to Destiny Udogie in that position. Djed Spence has done an admirable job covering for the Italian but will be able to focus on challenging Pedro Porro to be first-choice right-back.Depending on what happens with Cristian Romero’s future, they could be in the market for a right-sided centre-back. Luka Vuskovic enjoyed an impressive season on loan with Hamburg and caught the attention of clubs across Europe. There have been discussions about the 19-year-old signing a new contract with Spurs, but he will wait until after the World Cup before deciding his next steps. Hamburg would be very interested in him returning on loan, but currently don’t see it as a possibility.Tottenham Hotspur are progressing with a deal for Andy Robertson (Jack Thomas/Getty Images)What is the manager’s priority?Spurs need to upgrade their attacking options.Mathys Tel and Wilson Odobert have shown flashes of promise, but nobody has nailed down the left-wing role since former captain Son Heung-min joined Los Angeles FC last summer.Odobert and Simons are both recovering from anterior cruciate ligament (ACL) injuries, while Kudus missed the second half of the season with a groin issue and was unable to prove his fitness in time to make Ghana’s World Cup squad. Spurs need quality options to replace and then compete with those players when they are fully fit again.