Chad Bobrosky won two of Canada's three silver medals at the FINA world junior swimming championships. ((AP Photo/Gero Breloer) )

Chad Bobrosky of Calgary won two of Canada's three silver medals Tuesday to open the FINA world junior swimming championships.

Bobrovsky won a silver in the men's 400 freestyle with a time of three minutes 51.46 seconds behind first-place Fumiya Hidaka of Japan (3:50.97). Evan Pinion of the United States was third in 3:51.47.

Bobrosky then anchored the men's 4x100 freestyle relay to silver with Edmonton's Luke Peddie, Alec Page of Victoria and Toronto's Omar Arafa clocking 3:21.68, about a half second off the winning time of 3:21.10 set by the U.S.

"Chad's performances today were a big step for him," said Bobrosky's coach Dave Johnson. "Along with his relay leg we are really happy with how he swam tonight. The performances also augur well for his 200 freestyle."

Canada garnered a third silver in the women's 4x200 freestyle relay with Toronto natives Lauren Earp, Brittany MacLean and Victoria Chan and Tabitha Baumann of Ottawa clocking 8:04.92. The U.S. took the gold in 8:00.33.

"It was really important for us to get off to a good start," said MacLean, who entered the race with Canada in fourth place. "It shows the rest of the team that we prepared really well and it's only going to get better.

"It was a great to have an exciting finish and not giving up when we are behind, which is something we've really talked about."

Canada has fielded a 28-member team for the competition which runs until Sunday.