Chelsea must remind themselves of the trials and trepidations in Thomas Tuchel's pursuit for a new centre-half ahead of the summer transfer window.
The Blues were linked with Sevilla defender Jules Kounde ahead of the season and were understood to have agreed a deal worth around £43 million, according to The Athletic.
However, the subsequent sale of Kurt Zouma to West Ham reportedly saw the Spanish side's sporting director, Monchi, increase the asking price to £69 million to which Chelsea then halted their pursuit.
