 Chalobah made his debut from the start in Forest's trip to Doncaster Rovers on 21 September 2013.On 5 October 2013, Chalobah was sent off after a second booking in the 67th minute after already picking up a yellow in the first half during the away match against Brighton & Hove Albion.Though Forest were down to 10 men, they saw out a 3–1 victory.