Chelsea manager Thomas Tuchel said on Friday that his side's poor home form this season was an unusual scenario for him and their performances had to improve if they were to challenge the likes of Manchester City and Liverpool. Chelsea, third in the league standings with 62 points, fell to a 4-2 defeat by London rivals Arsenal earlier in the week, their third straight loss at Stamford Bridge in all competitions. The defeat represented the first time since 1993 that Chelsea lost three consecutive home games, while Tuchel's side have won only seven of their 15 league games at Stamford Bridge this campaign.