Should Chelsea sign Saul, he’d become the latest Atletico Madrid star to move to west London.
The Blues famously landed Diego Costa in 2014, when Jose Mourinho was in charge.
And they did the same with Filipe Luis that year although, like Costa, the Brazil international ended up returning to Diego Simeone’s side.
With Chelsea in pole position to sign Saul, that makes a deal likely.
And where the midfielder ultimately ends up, with Barcelona and Liverpool previously linked, remains to be seen.