Gasca is known as a king of upsets and has scored his most notable victories whilst fighting on the road. The first of them saw him claiming the PABA Bantamweight title when he travelled to Thailand and shocked Tabtimdaeng Na Rachawat with a 6th round TKO in 2010. Less than a year later Gasca claimed the OPBF Super Bantamweight title by upsetting Hiromasa Ohashi. Of course it's not been plain sailing on the road and following those two big victories he has lost to Yukinori Oguni, twice, and Alexander Bakhtin whilst also on the road.
It was the bout with Bahktin that first saw Gasca fighting for the IBO title and although he lost he did apparently scare Bakhtin into retirement with the Russian fighting just once more before quitting the sport.
For Sonjica this will be the second defence of the title he won last July, when he stopped Gasca's compatriot Silvester Lopez in 6 rounds. Sonjica is known as a serious power puncher with 14 stoppages in his 19 victories, though he has shown some frailties himself and has been stopped in both of his losses.
On paper this is a great fight between a hard hitting champion and a tough and determined challenger. Gasca will know he needs to be at his best to beat Sonjica and will hopefully be aware of what Sonjica did to Silvester a year ago.