Thomas Tuchel has admitted Chelsea's summer signing of Saul Niguez has taught the club a transfer 'lesson'.

The Londoners saw off competition from other sides to sign the Spanish midfielder on a season-long loan from Atletico Madrid, with the option to make this a permanent move at the end of the campaign.

Liverpool were one of the teams rumoured to be plotting a summer switch for Saul, but Jurgen Klopp's side opted against making any midfield purchase as trust was placed in the likes of Curtis Jones and Harvey Elliott stepping up.

READ MORE: John Henry in crisis talks as FSG face big headache away from Liverpool

READ MORE: Alisson sparks Everton fume as Diogo Jota leaves Liverpool fans confused

Saul has so far struggled to make much of an impact at Stamford Bridge since his arrival after making only seven appearances in all competitions, starting only twice in the Premier League.

Handed a rare league start last night against Watford, the 27-year-old was subbed off at half-time having picked up a yellow card just 16 minutes into the match. Speaking after the game, Tuchel delivered an honest assessment of Saul's Chelsea career to date.

“I don’t know where he goes from this performance but he was on a yellow card so we had two options,” said the German. “We could have taken Marcos [Alonso] off who also had a yellow card and try Saul as a wing-back."

Ahead of last night's trip to Vicarage Road, Tuchel was quick to admit that Chelsea were yet to see the best of Saul and that his adaptation to the English top-flight remains an ongoing process.

Although Liverpool passed on the chance to recruit the 2020/21 La Liga winner, the Reds may well have no regrets that it was their title rivals who secured his signature.

*Give us your Liverpool player ratings for the win at Everton:

“I think every single player needs his time to adapt and Saul needed his time. He competes with a lot of high quality players in midfield,” expressed Tuchel.

“We need to understand him a bit better, not in terms of language, but in terms what is his real strength, the detail of the player, what can he add to the squad, where is his maybe unique quality and it was not easy.

"I guess it’s the first time he plays for another club than Atletico, he comes from the academy there, and we have to accept the style of the game is so different from Spain to here.

“It teaches us a lesson that everybody needs individual time to adapt. Since many days he is stronger, I feel him a bit more relaxed and at the same time that gives him a little bit more freedom to impose his quality."