He told the Mirror: "Arsenal are playing some really good football right now and Chelsea are starting to get back on a good run, so they're a big threat as well.
"And we know Liverpool will be there or thereabouts, so I think it will be a much closer title race this season, without doubt.
"It's good for the Premier League, for the fans and for English football to have so many teams competing for the title.
"I'm delighted with my game at the minute. I'm playing well, scoring goals and we're winning games, so I just want it to keep that going.
"When you're out, as I was at the start of the season, you're always looking at other players who are scoring and playing, and you just want to be out there with them.
"So it was frustrating, but I'm just delighted to be back, doing what I love most. The difference now is I'm scoring on a more consistent basis.
"In previous years I'd score for three or four games, then go three or four games without a goal. This year I've managed to do it in consecutive games, which is great. Now I feel like I'm going to score every time I play."