Blues boss Lee Clark on building on Wednesday's comfortable win against Swindon:
"I was pleased with 99 per cent of the other night against Swindon Town. We could have done a little bit better without the ball in certain parts of the first half, but the good thing was the players took on board what was said at half-time and they did it really well second half. All in all there were good performances individually and collectively so we move on to this one.
"There will be a few changes to the starting XI because we have to keep giving players minutes and give them the opportunity to stake their claim about getting in the starting line-up.
Clark on the possibility of changing his side's system and how pleased he is with the way pre-season is progressing:
"I keep telling the players to give me problems in terms of picking the team for Watford so there will be other opportunities and we might look to change the system as well.
"In terms of these games it’s about us making sure we started getting things bedded down and the players start knowing their roles and responsibilities in the team, whichever system we play.
"They’ve had a terrific pre-season so far. What we’ve done is kick-on and what I’ve said to these lads starting with Swindon and these last three games is that we’ll be preparing as if we were preparing for a Championship game . Obviously that will tell in terms of our performances
Tom Adeyemi and Matt Green are expected to return tomorrow after missing Wednesday's game against Swindon. Darren Ambrose (groin), Nikola Zigic (back), David Murphy (knee), Will Packwood (leg) and Jonathan Spector all miss the game.
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- Oxford United were founded in 1893, when they were originally known as Headington United. They only changed their name to Oxford United in 1960.
- They joined the Football League in 1962 after winning the Southern Football League,
- Ron Atkinson holds the club record for the most overall appearances with 560.
- Oxford moved to their current home ground - the Kassam Stadium, in 2001. That was following76 years at the Manor Ground.
- Oxford's only major trophy success was winning the League Cup in the 1986