Watford head coach Ed Still said he was "really disappointed" by his side despite them rescuing a point late on at Sheffield Wednesday.
Jerry Yates's header in the 54th minute sparked hopes of what would have been only the Owls' second win of the season after the Hornets had dominated much of the first half.
Watford substitute Vivaldo Semedo, however, reacted quickest after Owls keeper Pierce Charles' spilled Pierre Ekwah's 90th-minute shot to spare the visitors’ blushes.
"Really disappointed, strange game," Still told BBC Three Counties Radio after the match.
"We've created some fantastic opportunities there in the first half, which we've been doing well in the previous games to take.
"We've gotten ahead in games early previously and again, we started really well. We've come up there with what felt like four or five really big chances in the first half and we didn't take them.
"Then the injury to [Jeremy] Petris kind of put a halt to the positive flow that we had going. And again, it's disappointing, it's really unlucky to get that injury, but you've got to reshuffle.
"We didn't have [Jeremy] Ngakia with us and so we've got to reshuffle a little bit, find a different balance. Then we've come out in the second half and we haven't been stable enough in that second-half performance just to keep pushing and we've kind of opened up maybe a little bit too much and we've given away a few huge chances to them."
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