The defending Premier League champions welcomed the Hornets to Stamford Bridge after a three-games winless run in the Champions League and the Premier League.
Chelsea lost 1-0 to Premier League leaders Manchester City before the international break after Kevin De Bruyne scored a second-half winner against his former club.
The west London side lost 2-1 at the Premier League’s basement club Crystal Palace at Selhurst Park to leave the title holders a staggering nine points behind Manchester City.
Chelsea’s winning run came to an end in the Champions League last week, although the Blues fought back to secure a 3-3 draw with Serie A giants AS Roma.
The defending champions were 4-2 winners against an impressive Watford side at Stamford Bridge at the weekend after Chelsea came from 2-1 down to beat Marco Silva.
Courtois believes the west London side’s 4-2 victory proves that the Chelsea squad are still behind Conte despite increasing uncertainty surrounding the Italian’s future at Stamford Bridge.
“When a top team has a few bad results the first thing they [the media] try to say is that the players are not happy and we’re not behind the coach, but against Watford you saw we fought for every moment and we fought when we were down, so everybody can see we’re behind the coach,” Courtois told Chelsea’s website.
Chelsea signed six players in the summer transfer window after the defending champions brought in Willy Caballero, Antonio Rudiger, Tiemoue Bakayoko, Alvaro Morata, Danny Drinkwater and Davide Zappacosta.
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