The Belgian internationals started together for the first time at club level as Toby made his debut for us at Old Trafford on Saturday.
Indeed, they were one of four Belgians in the team alongside Jan Vertonghen and Nacer Chadli.
Both expressed their disappointment at a narrow 1-0 defeat and spoke positively going into Saturday’s first home game of the campaign against Stoke at the Lane.
“We’re all happy Toby is here not just because he’s Belgian but because he’s a great guy and a great player,” said Mousa.
“Last season we had a good group and that hasn’t changed. Toby has a good positive vibe around him and as everyone could see at United, he’s a fantastic player as well.
“We were disappointed to lose at United but you can see the quality we have and that’s why we believe in ourselves.”