A novelty. Apparently, the Azeri GM did not want to double  his pawns on the e-file.
1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. b1c3 In a must-win situation, Carlsen follows the  advice of Sveshnikov and rejects the main lines. 3... e7e5  4. f1c4  4... f8e7  5. d2d3  5... g8f6  6. e1g1  6... e8g8  7. c3d5  7... d7d6  8. c2c3 It is effectively a Ruy Lopez/Italian  now. 8... a8b8  9. a2a4  9... f6d5  10. c4d5  10... e7f6 Radjabov frees the e7-spot for his knight. 11. f1e1 