@Harbour Dog van Foreest was playing White against Pragg's Sicilian at Tata Steel. He played 2. ... Nc6 3. Bc4 which I don't like. What do you think?
That definitely looks like a strange opening choice. Black is nearly guaranteed to win a tempo at some point early on with a pawn push that attacks that Bishop, and with no obvious benefit for White.
Part of what makes van Foreest such a strong player though, is his incredible preparation in these questionable, surprising lines. If he played it, it's pretty much guaranteed that he knows the intricacies inside out. I had a look at the game, and it's not surprising to me at all that van Foreest won. I don't remember it live, but I bet at the time, Pragg quickly got behind on the clock after Bc4, and van Foreest was able to blitz out accurate moves for quite a while.
If I was going to rank the best players in the world at being able to convert these types of surprising openings into big advantages in game, it would be:
1. Rapport
2. van Foreest
3. Caruana
He is nearly as well prepared as Giri, but he focuses his preparation on trying to surprise opponents. Scary guy to play for anybody in the world.