Flying rockets and air raids: how football has changed in Ukraine

'There were a lot of mines around [the pitch]', says the former captain of Obolon Kyiv's second team. 'Even now we are still afraid to kick the ball over the fence.' Kostja Kovalenko describes the reality of life at the team's training ground before their first match in Ukraine's second tier, as the Guardian visits the outskirts of Bucha, a war-torn suburb of the capital.