Keeping a winning team motivated?

Guys my team is 2-0 and won both games big against good teams. But thats it we are ONLY 2-0 and these kids are acting like we are already the champs. They are not being disrespectful or talking back, but the intensity in practice has not been there. EVERYDAY I remind them that the rest of the teams on our schedule will do everything they can to keep us at 2 wins. If an outsider come to watch us practice they would think we where 0-2 and no one really cared(besides the coaches). What have you done to keep a winning team on track?

PS
It is a freshmen team in case that makes a difference. Also, today is pregame and we play a hard hitting,well coached team tomorrow. Any advice.