Chelsea have signed five new players ahead of the 2020/21 season.
Hakim Ziyech, Timo Werner, Ben Chilwell, Malang Sarr, and Thiago Silva are the new faces at Stamford Bridge this summer, as the Frank Lampard revolution begins to take shape.
First through the doors was the Morocco international as his €40m (£33.4m) move from Ajax - which could potentially increase to a maximum of €44m - was agreed shortly after the January transfer window closed.
Ziyech was soon joined by Werner as the Blues won the race ahead of Liverpool and Manchester United by triggering the £47.5m release clause in his contract at RB Leipzig.
This week has seen a flurry of activity with the west London outfit announcing as many as three confirmed deals which was kick-started by Chilwell's £50m transfer from Leicester City.
Next up was Sarr as he was snapped up on a free after his contract at Nice expired at the end of last season.
And on Friday [August 28] Thiago Silva became signing number five, and with links to the likes of Kai Havertz, Jan Oblak and Edouard Mendy there's expected to be more signings before deadline day.
Of the five new arrivals, only Sarr won't feature for in the Blues next season as he will be loaned out to get regular first-team football.
Although none of the new arrivals have been allocated a squad number just yet and with the season starting in three weeks, the matter should soon be addressed.
But what shirt numbers are available to the other quartet right now?
Below, we take a look to see what numbers are currently free at Stamford Bridge.
No.10
Willian has now gone.
The player was out of contract at the end of the 2019/2020 season and has since completed his move to London rivals Arsenal following months of speculation regarding his future.
No.11
The No.11 is also currently up for grabs with Pedro sealing a free transfer to AS Roma.
No.25
Although the No.25 shirt has not been officially retired by the club, it seems that Chelsea do not want anyone to take on Gianfranco Zola's famous number.
Departing for his home country back in 2003, nobody at the club has worn the shirt since the Italian maestro departed over a decade ago.
No.26
As is the case with the No.25 shirt, John Terry's No.26 may well be left vacant following his trophy-laden spell at Stamford Bridge.
No.27
Andreas Christensen's move to the no.4 has left the no.27 vacant.
No.30
This became vacant when David Luiz joined Arsenal in the summer.
It's a squad number that has been worn by the likes of Yossi Benayoun, Tiago and Jesper Gronjkaer in the past.
No.32
The No.32 shirt has been vacant following Marco Amelia's departure in 2016.
Andreas Christensen, the club's current No.4, had worn the number during the 2012/13 season.
