West Ham will head into the FA Cup game as the favourites, but Tomkins has urged his teammates to stay alert to the threats coming from the League One side.
“I think our experience of playing in the Championship not that long ago will help us, we know what to expect more or less,” said the centre back.
“Obviously, they are doing very well in League One. It'll be a physical game and they will try and bully us, it'll be a hard game for sure.”
One of the main tactics for any side going into a match against a higher quality opponent is to be physical and attempting to level the playing field.
The Football League is arguably more physical than the Premier League and Tomkins is spot on to point out that West Ham need to be wary of bullying tactics this weekend.
West Ham boss Sam Allardyce will more than likely be keen to stress to his team the need for a strong presence in all areas and Tomkins is one such player who can throw his weight around in the back four.
What West Ham can’t afford is any poor discipline, which sees their players get carried away with the physical battle, losing focus in relation to the result and main aim of winning the game.
West Ham can also utilise their greater pace and higher quality players in possession to shift the ball around quickly, which will make it more difficult for Bristol City to start putting challenges in.
West Ham are strong in a number of areas and if Bristol City want a fight, they’d better be prepared to go the distance.