Sport makes fairy tales seem real at times. All those youngsters who want to be like Serena Williams or Rafa Nadal dream that one day they will reach a Grand Slam final. Few achieve it. But, from time to time, in tennis, logic seems to break into a thousand pieces and an unexpected guest arrives at the final. It's as if the system fails and a door opens for a modest athlete. This year, a second-tier player who has been competing for years without making much noise has reached the grand final of Roland Garros. The Pole Maja Chwalinska arrived in Paris without attracting anyone's attention and has magically become the woman of the moment.