With MotoGP on its summer break, and the riders combining a bit of relaxation with a lot of training, there is time to review the first half of the season. Who has performed above expectations, and who has fallen short? Here's a rundown of how we rate the MotoGP riders over the first half of the season. Today, the top eight riders in the championship, from Marc Marquez to Andrea Iannone. The remainder, from Stefan Bradl to Mike Di Meglio, will appear on Friday.