Chelsea have boosted in their pursuit of RB Leipzig defender Josko Gvardiol.

Gvardiol, 20, was reportedly the subject of a £77million bid from the Blues late in the transfer window.

Then-boss Thomas Tuchel wanted to secure Gvardiol's signature ahead of Man City before loaning him back to Leipzig for the season.

But a huge offer for the centre-back was rejected as the deadline approached.

Transfer guru Fabrizio Romano has added to the speculation by claiming that Leipzig are ready a swoop for Sutalo to fill the potential void left by Gvardiol.

He tweeted: “RB Leipzig are interested in Dinamo Zagreb's centre back Josip Sutalo. There are more than three clubs in the race, including English and Spanish clubs - as he's considered a top talent.

“Talks will continue in the next months for Sutalo's next step."