That result left the west London club three points behind fourth-placed Arsenal, albeit with a game in hand.
"His potential as a player is very, very, high", he said.
Arsenal and Chelsea, however, might need a path into the top-tier competition next season by taking the place reserved for the Europa League victor. "I am really very happy for him and for the hat-trick, and I am really very happy with him". "Making that step up is very hard and he showed that he can score goals from that position with his pace".
The arrival of Gonzalo Higuain as the replacement for Alvaro Morata in January once again hurt his chances of establishing himself as a regular starter domestically though.
Both are in a tight race for a top-four finish in the Premier League. I don't like that, ' said Sarri. So, for the opponents, it was really a very hard situation.
"If you give someone like Giroud space in the six-yard box that's how good he can be".
Football news - Arsenal draw Napoli in quarter-final, Chelsea to face Slavia Prague
Portugal takes on Germany as Benfica are drawn with Eintracht Frankfurt for the third quarter-final.
Earlier, Legit.ng reported Arsenal progressed to the quarter-final round of the Europa League after thrashing Rennes 3-0 on Thursday, March 14, at the Emirates.
Napoli have confirmed trio Lorenzo Insigne, Vlad Chiriches and Amadou Diawara will be out for the next three weeks with injury - with all potentially missing the Europa League quarter final first leg against Arsenal.
"Chelsea are looking very, very good to go on and at least get to the final, if not win it", Walker added.
The victor of the quarter-final between Napoli and Arsenal will certainly be favourite to make the final, both of which are capable of causing a serious threat to the Blues. "I had to take it slowly but I'm building up nicely".