West Indies Batsman Ramnaresh Sarwan said that his team has to "stay positive" against Indian off-spinner Harbhajan Singh as they meet in the four match ODI series scheduled to begin on friday."We've got experience within experience and hopefully we'll come together as a unit. Over the years, we've tried to rotate the strike as much as we can but we know how good Harbhajan Singh is and he's been a very good performer for India over the years," Sarwan said.