Port Vale recovered from going a goal down against Swindon Town through Fabien Robert's early strike to go in level at half time thanks to Uche Ikpeazu's equaliser.
Swindon defender Jordan Turnbull was involved in an early off-the-ball incident as he tangled with an opponent, but the referee took no action.
The first goalmouth action came when Nathan Byrne picked out Michael Smith, but Jak Alnwick was out quickly to smother the danger.
The home side took the lead on 12 minutes when Anton Rodgers found Robert, who swept the ball into the far corner of goal.
However, Vale levelled nine minutes later through Watford's on-loan striker Ikpeazu, who held off a Swindon challenge and fired home.
Byrne then drew a save from Alnwick and Sam Foley's mazy run ended with a shot that was claimed by Lawrence Vigouroux, but it remained level at the break.
Joe Sharratt
