Andy Robertson’s move to Tottenham is expected to be confirmed soon, but the Scotland captain may have to leave something important behind.Tottenham Hotspur‘s first signing of the summer was effectively confirmed last week, with Fabrizio Romano revealing that Andy Robertson’s move to North London is finally set to go ahead.The Scotland captain had already admitted in January that he was close to joining Spurs, but the transfer ultimately collapsed due to Liverpool’s lack of depth at left-back during the second half of the season.According to Romano, Tottenham and Robertson had already reached a verbal agreement during the winter window, with the move dependent on Spurs retaining their Premier League status.After Roberto De Zerbi guided the club to safety on the final day, the conditions for that agreement were met. Tottenham have since managed to fend off late interest from Juventus, who attempted to hijack the move, and the experienced defender now looks set to become the latest addition to De Zerbi’s rebuild.Photo by Liverpool FC/Liverpool FC via Getty ImagesWhy Andy Robertson cannot wear his iconic No.26 at TottenhamAhead of what is expected to be an official announcement once the transfer window opens on June 15, plenty of Tottenham supporters have been discussing which squad number Robertson could inherit.The 32-year-old has worn the No.26 shirt throughout his nine-year spell at Liverpool and also during most of his time at Hull City. However, that number appears unavailable at Tottenham.SeasonClubShirt number25/26Liverpool FC2624/25Liverpool FC2623/24Liverpool FC2622/23Liverpool FC2621/22Liverpool FC2620/21Liverpool FC2619/20Liverpool FC2618/19Liverpool FC2617/18Liverpool FC2616/17Hull City315/16Hull City2614/15Hull City2613/14Dundee United FC26The No.26 shirt has not been worn by a Spurs player since club legend Ledley King retired in 2012. While Tottenham have never formally announced the number as retired, nobody has been handed it in the years since. Given his status as one of Tottenham’s greatest modern defenders and a one-club man who made more than 300 appearances for Spurs, it is difficult to imagine the No.26 being handed out any time soon.Which shirt numbers could Andy Robertson choose instead?The only other squad number Robertson has worn during his professional career is No.3, which he used during his final season at Hull City before earning his move to Liverpool.At present, that shirt belongs to Radu Dragusin. However, with reports suggesting the Romanian could leave this summer, the number may become available. It would certainly make sense for a left-back, given the traditional association of the No.3 shirt with that position.There is one complication, though. Destiny Udogie is also understood to be a fan of the number and could potentially be interested if it becomes vacant.Other possibilities may emerge depending on departures. Cristian Romero’s No.17 and Ben Davies‘ No.33 could both become available if the expected summer exits materialise.READ MORE: Tottenham make Joao Palhinha transfer decision that will break De Zerbi’s heartThe post Andy Robertson must do something he has only done once in 13 years at Tottenham appeared first on Spurs Web.