Since Roman Abramovich’s takeover at Stamford Bridge in 2003, Chelsea have become notorious for their ruthless transfer policy.
While it may have paid off in some areas, there were a few big names and famous faces that got away.
Here is a look at eight players that Chelsea let slip through their fingers:
1. Mohamed Salah
Premier League top goal scorer, Mohamed Salah, has taken England by storm this time round.
With 42 goals in all competitions this season, Chelsea will be kicking themselves they let this one get away.
After signing from Basel in 2014, Salah played 13 times for Chelsea, scoring twice, before being loaned out to Fiorentina on the last day of the January transfer window in 2015.
The now Liverpool man had the last laugh however, scoring against his former club in the 1-1 draw between the two sides at Anfield in November.
2. Kevin De Bruyne
Arguably the best midfielder in the world this season, it is an all too familiar incident of ‘what could have been’ for Chelsea.
After signing for Chelsea in January 2012, De Bruyne spent the rest of that season on loan at his former club Werder Bremen, where he racked up 10 goals and 10 assists.
Upon returning to Chelsea, he made his competitive debut for The Blues in January 2014, before being transferred to Wolfsburg, where he was later named Germany’s Footballer of the Year in 2015.
With 12 goals and 19 assists this season already, this has to be the hardest to swallow.
3. Kylian Mbappe
The 19-year-old wonderkid on loan to Paris Saint-Germain, from fellow Ligue 1 side Monaco, has only ever played for these two clubs.
But, things could have been a lot different if Chelsea hadn’t of snubbed the chance to sign Mbappe as a 10-year-old.
The French international revealed that he played for The Blues in a trial game as a youngster, against Charlton Athletic, but wasn’t offered a contract.
Compared to the £170m price tag on his head today, Chelsea could have picked him up for a real bargain price.
4. Romelu Lukaku
Lukaku signed a five year contract at Chelsea back in 2011, but only went on to make 10 appearances for the club, not scoring a single competitive goal.
After loan spells at West Bromich Albion and Everton, the Belgian striker made his move to Goodison Park permanent in July 2014.
Lukaku has gone on to play 66 times for his homeland Belgium, scoring 33 goals.
With a price tag of around £75m plus add-ons, when he signed for his current club Manchester United, and 29 goals this season already, it is yet another to add to the list of players who got away.
5. Filipe Luis
The Brazilian international was signed as a replacement for an out of contract Ashley Cole, in July 2014, from Spanish side Atletico Madrid.
After making a measly 15 appearances for Chelsea, he re-joined his former club a year later, with Cesar Azpilicueta over taking him in the left back pecking order.
In his time at La Liga side, he has won La Liga, UEFA Europa League, Copa del Rey and the UEFA Super Cup.
6. Radamel Falcao
After a disappointing loan spell at Manchester United the season prior, Radamel Falcao signed on loan for Chelsea in July 2015, from Monaco.
The Colombian striker played ten times for Chelsea, scoring just once in his short stint for the club.
At the end of the 2015/16 season, Falcao re-joined parent club, Monaco, where he has since won Ligue 1, finishing the season with 21 goals in 29 league appearances.
In 2017, Radamel Falcao was also nominated for the Ballon d’Or.
7. Luke Shaw
The London-born defender grew up supporting The Blues and played at Chelsea Football Club’s development centre, in Guildford, at the age of eight years old.
The England international was not offered a place at Chelsea’s academy, and went on to join Southampton’s youth set up, where he went on to play for three years.
Joining Premier League giants Manchester United in June 2014, Shaw has played 39 times for his current club.
8. Juan Cuadrado
Cuadrado signed for Chelsea from Fiorentina in February 2015, with Mohamed Salah going the other way on loan, as part of the deal.
With two loan spells at Juventus during his short lived career at Stamford Bridge, the Colombian made his move permanent to the Serie A outlet in May 2017.
Juan Cuadrado only made 13 appearances for Chelsea and has since gone on to win the Serie A twice with Juventus.