Both Chelsea and Jose Mourinho are having a tough time in the 2018 summer transfer market.

With just over two weeks remaining, both parties are well aware that they have a lot of business to conduct.

The Blues, under Maurizio Sarri, have made just one signing in midfielder Jorginho, but they have been linked with players all across Europe.

As for Mourinho, his Manchester United side need to keep up with their rivals having only secured deals for Fred and Diogo Dalot.

One man Mourinho has had his eye on is Chelsea's Willian, who he brought to Stamford Bridge back in 2013.

But who else did the self-proclaimed Special One bring in back in the summer of 2013, when he returned to west London?

Well, they weren't exactly great, with only one of them still actually at the club. Here they are in all their glory

1. STIPE PERICA (ON LOAN AT FROSINONE)

Not exactly a household name. The Croatian striker was signed from NK Zadar and went on to make a grand total of zero appearances for the Blues.

Loan spells at NAC Breda and Udinese saw him eventually bought by the latter, who have decided to loan him out for the upcoming season.

2. CRISTIAN CUEVAS (ON LOAN AT AUSTRIA WIEN)

Another signing who failed to make an appearance at Stamford Bridge. Signed from Chilean club O'Higgins - that is their real name - the 23-year-old left-back has been quite the journeyman.

Loans at Vitesse, FC Eindhoven, Universidad de Chile and Sint Truiden led to him being bought by Huachipato, who have let him enjoy a season in Austria.

3. MARCO VAN GINKEL (CHELSEA)

Had it not been for injuries, the Dutch midfielder would likely have been in the Chelsea squad by now.

After shining with Vitesse, he was snapped up by the Blues, but he suffered an ACL injury after just two games. They've been his only two appearances so far, ouch.

4. CHRISTIAN ATSU (NEWCASTLE)

Yet another member of the zero Chelsea appearances club. Atsu was snapped up after a decent spell at Porto but failed to be given a chance.

Loans at - you guessed it - Vitesse, Everton, Bournemouth, Malaga and Newcastle followed, before finally signing for the Toon Army on a permanent basis.

5. ANDRE SCHURRLE (FULHAM)

Saved the best to last. Not that Schurrle was brilliant for the Blues, but at least he made 44 appearances across two years.

He also scored 11 goals, but was shown the exit door, enjoying time at Wolfsburg and Borussia Dortmund. He's expected to complete a loan move to Fulham shortly.