Santiago Vergini is on a two-year-long loan at Sunderland . Defender has an option for a season deal at Black Cats if they stay up . Argentine admits only downside at Wearside has been the weather .
Santiago Vergini is on a season-long loan at Sunderland . Defender has an option for a two-year deal at Black Cats if they stay up . Argentine admits only downside at Wearside has been the weather .