After promising heavy investment, Tottenham Hotspur’s majority shareholders, the Lewis family, appear to be following through on a comprehensive squad overhaul not seen since the not-so-magnificent seven replaced Gareth Bale in 2013.The scale this summer could be even greater (and hopefully with a higher hit rate). With the announcement that Martin Dubravka will join the club upon the expiry of his contract with Burnley on July 1, Tottenham have completed four signings.There are strong links to Sandro Tonali, who is valued at around £100million ($133m) by Newcastle United, and Mateus Fernandes, who is understood to be available for £80m ($106.7m) from recently-relegated West Ham United. That is before the inevitable reinforcements in attacking areas.As such, there are few spots in Roberto De Zerbi’s starting XI that are set in stone. After signing a new contract, Tottenham have shown commitment to Pedro Porro as a starting right-back. Discussions to extend Micky van de Ven’s could follow. These are highly coveted international players with pedigree, and it’s no surprise that De Zerbi wants to build around those profiles.Antonin Kinsky looks set to sign a new deal too, which reflects a remarkable ascendance.Kinsky was substituted after just 17 minutes away to Atletico by then manager Igor Tudor (Thomas Cox/Getty Images)It was March 10 when Kinsky, 23, had a humiliating night in the Champions League against Atletico Madrid. At the time, many speculated that the game, in which he twice made mistakes leading to Atletico goals before being substituted in the 17th minute of a 5-2 defeat, could be the end of the 23-year-old’s career at the top level.Loris Karius was served up as the inescapable comparison after his performance for Liverpool against Real Madrid in the 2018 Champions League final.Karius, who is understood to have suffered a concussion during the match before committing two errors that led to goals, has forged a respectable career as a back-up across Europe and is now the starting goalkeeper for Schalke, who won the German second tier last season. Still, his name is forever associated with that night in Kyiv. For Kinsky, his sliding-doors moment proved to be his making.