Tottenham have secured their third signing of the summer after completing the transfer of defender Cristian Romero from Atalanta for a fee in the region of £42m.The north Londoners had been linked with the Argentina international for some time. Reports emerged earlier this week that the deal was close to completion. And the clubs official website revealed the signing on Friday evening.We are delighted to announce the signing of Cristian Romero from Atalanta, a statement read. Cristian will wear the number four shirt.Romero, 23, joins having been named as ‘Best Defender’ in the Serie A last season, with his performances helping Atalanta to third-successive third place league finish.The youngster began his career at Argentine club Belgrano. He made the move to Europe in 2018, joining Italian outfit Genoa.The Cordoba-born ace then moved to Juventus but was loaned back to Genoa for 2019-2020, making 30 Serie A appearances. Romero was loaned to Atalanta last year, a move that became permanent prior to his move to Spurs.La Dea paid  16m for the centre-back, meaning the club netted a huge profit on the deal. Romero is Spurs second permanent signing this summer.Winger Bryan Gilhas arrived from Sevilla while goalkeeper Pierluigi Gollini was a loan capture – also from Atalanta.Romeros move to the Tottenham Hotspur Stadium was just a matter of time. He revealed on Thursday the reasons behind his decision.He told Sky Sport Italia (via Sport Witness): Im happy to have made a right choice again. Im very happy for the year I had at Atalanta. I thank all of Bergamo, Im sorry to leave it but I have to think about my career and I hope this is a good choice.I have to keep growing and doing this, I have to think about doing well now.He added: The Italian league was very important for me; it made me grow in all respects and Im very happy to have played here and now I have to continue.The Premier League is a very difficult championship. But I have to be ready to do everything and continue as I have done until now.Romero has inked a five-year deal with Tottenham and will replace Toby Alderweireld in the rearguard. The Belgium left the club this summer to join Qatari outfit Al-Duhail after six years with the Lilywhites.Davinson Sanchez is on the verge of leaving and Spurs are thought to be in the market for one more defender.READ MORE: Kane appeals to Tottenham fans after revealing next step in Man City saga