The Dane scored in the 1-1 result.
"I'm really happy to score my first goal in the Premier League but it would have been much better with a win," admitted Eriksen to the Spurs website.
"West Brom wanted a draw at least, certainly not to lose, got players behind the ball and we had to try to get through.
"We got through a couple of times and got around the sides and we had the chances to score, we were a little unlucky.
"First half was up and down, in the second half we had more control, we had the chances, but there wasn't that much space. We had to do what we could with and without the ball.
"We gave everything and we have to keep going - and hopefully I'll score a few more goals."