Tuchel said: "We called both of them up, because first of all we think both of them deserve it.
"They played big roles in two very successful campaigns for their clubs last season. Adam was involved in major trophies for Crystal Palace, and was a key player in the central midfield. Elliot was a key part in a campaign that led to Europe for Nottingham Forest.
"Both of them deserve it, they have had a good start to the season. They have full rhythm. It's time for more competition. It's time for a bit of fresh blood, and that's why they deserve to be with us."