Ahead of fifth India-England Test, former India wicketkeeper-batter Parthiv Patel said either Washington Sundar or Ravindra Jadeja could be India's X-factor, adding Shubman Gill is the player to watch out for. "There's that drift and bounce at The Oval, if a spinner does well, you can aim for a win," he said. Parthiv predicted India will level the series 2-2.