Photos from Tuesday's session...
Nathaniel Mendez-Laing was involved in his first training session as a Boro player on Tuesday morning.
After joining the club yesterday, the winger was introduced to his new teammates on the training field today, including fellow January recruits Jordan Archer, Darnell Fisher and Yannick Bolasie.
Having anticipated the snowfall which would coat the club's Rockliffe Park headquarters, the session was relocated to the Riverside Stadium, where Neil Warnock cast a watchful eye over proceedings.
Boro's other Deadline Day arrival, Neeskens Kebano, was travelling to Teesside on Tuesday and will link up with his new teammates later in the week.