This only makes things more difficult for Carlsen.
1. d2d4  1... g7g6  2. e2e4  2... d7d6  3. g1f3  3... g8f6  4. b1c3  4... f8g7  5. f1e2  5... e8g8  6. e1g1  6... a7a6 A must win situation, and Carlsen avoids the main theoretical lines. 7. a2a4  7... b8c6  8. c1e3 The immediate 8.d4-d5 is becoming the main line according to my Megabase. 8... b7b6  9. d4d5 Simple and strong. White gains some more central squares with a tempo. 9... c6b8  10. f3d4 A logical follow-up. 10... c8b7  11. f2f3  11... c7c6 Carlsen frees his position a bit and finally enters Dragon waters. 12. d5c6  12... b8c6  13. d4c6  13... b7c6  14. d1d2 The most natural move. The rooks are connected, and White is ready to swap off the important black dark-squared bishop. 14... f8e8  15. f1d1  15... f6d7  16. e3d4  16... g7f8 The same policy of avoiding the exchanges. The bishop also covers the d6-pawn, which prepares Black's next move. 17. e2c4 Provocation. 17... e7e6 Granted. 18. c4f1  18... d8c7  19. d4e3 Carefully watching the d6-pawn. 19... c7b7  20. b2b4 Radjabov spotted a vulnerable bishop and went for it!