Leeds United lost 2-1 at Peterborough United on Saturday afternoon.
The 21-year-old experienced Leeds' travelling support for the first time since joining the club on loan from Swansea City in Saturday's 2-1 defeat by Peterborough United.
It might have only been a friendly, but the Whites fans were in fine voice nevertheless and Grimes acknowledged their effort at the ABAX Stadium yesterday.
Asked by LUTV what the away support was like, Grimes said: "Yeah, quality. You could hear them from the first minute to the last, even when we went behind and then at the end they gave us a really good send-off."
It was Garry Monk's first defeat as Leeds manager since replacing Steve Evans this summer but, with the League One outfit being at a deeper stage of pre season, nobody will be overly concerned about the result.
Alex Mowatt had given the Whites a 1-0 half-time lead, but a second-half brace from Shaquile Coulthirst flipped the jovial affair on its head after the break.
It was United's penultimate pre-season friendly of the summer. Next Saturday, they host Serie A outfit Atalanta at Elland Road, before Monk and co then turn their attentions toward a visit to QPR on August 7 for what Leeds fans will hope proves the first stop in a promotion-winning season.