The two youngsters are working with the first-team.
Arsenal have had a busy week. They picked up an excellent win against Bayern Munich in the Champions League this week and that meant a few first-teamers missed out on training and a few youngsters got the chance to shine.
The pair were captured clashing in training on numerous occasions as the pair look to prove themselves and become regular first teamers.
Kamara is a strong central midfielder who has recently been impressing for the club's youth teams and the 19-year-old was called up to the Finland seniors.
Sheaf is more of a dynamic midfielder compared to the defence minded Kamara. The England youth international is just 17-years-old and has big hopes of becoming an Arsenal regular in years to come.
To see the two training alongside each other for the first-team is a big step forward and hopefully they can go on to become regular Arsenal starters.