But the Belgium global has often been used as a substitute in that time, playing second fiddle to Diego Costa for most of his time at Stamford Bridge.
Everton were also interested in the Belgium worldwide but have been scared off by the asking price, while West Ham have failed in their attempts over a loan deal.
Crystal Palace reportedly remain confident of getting a loan deal over the line for Chelsea striker Michy Batshuayi. PSG returned with a second offer for the Senegal global late on deadline day but, as with their opening £21.5m approach last week, it was insufficient to break Everton's resolve to keep the 29-year-old at Goodison Park.
It came after Chelsea refused to deal with Tottenham over a potential loan deal for the Belgium striker. However, because the Toffees already have Kurt Zouma on loan, that would have to be a permanent switch.
"Now, a big, big development as well in the last few minutes because we have been told that talks have also been held with Spurs about Michy Batshuayi moving on loan to Spurs".
Arsenal have completed the loan signing of Denis Suarez from Barcelona and sent 18-year-old Emile Smith Rowe to RB Leipzig until the end of the season.
"But the main development with Michy Batshuayi is that it looks like he's going to go out on loan again".
West Ham are interested in Chelsea outcast Danny Drinkwater to boost their midfield ranks, according to TalkSport. All parties are hopeful of getting the deal over the line before Thursday's 11pm deadline.