That St. Pete tournament (1914) was perhaps the strongest tournament up to that time.
The players were Lasker, Capa, Alekhine, Tarrasch, Marshall, Bernstein, Rubinstein, Nimzowitsch, Blackburn, Janowski and Gunsberg. In the first round, each played the other players once, with the five highest scores advancing into the final round.
Capa led after the first part, 8 to 6.5 (Lasker and Tarrasch). Alekhine and Marshall each scored 6.
In the final round, Lasker scored 7 of 8, drawing with Capa and Tarrasch, while winning all his other games. Capa, meanwhile, lost to both Lasker and Tarrasch in the finals, in addition to drawing one game with Alekhine.
Final standings were:
Lasker, of course, was the World Champion at that time.
There is a photo of the participants at:
The participants are labeled in the photo, with the exception of Bernstein....maybe he's the only one who remembered to bring a camera, so he ended up taking the picture...