It seems as White threats are serious, however:
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... d7d5  4. c4d5  4... f6d5 So needed to hold in this game  in order to wrap up the match, and his choice is the very well analyzed  Improved Tarrasch Defense. 5. e2e4  5... d5c3  6. b2c3  6... c7c5  7. a1b1 Nepomniachtchi  decided to keep as many pieces as he can on board, for the aforementioned  reason. 7... f8e7  8. g1f3  8... e8g8  9. h2h4 In the spirit of the Grunfeld Defense. Up to here the  players followed another game of So, versus Ding Liren. 9... b7b6 This is considered to be a side line. 10. h4h5  10... h7h6  11. f1d3  11... c5d4  12. c3d4  12... b8c6 So plays in a similar fashion as in his game  against Ding. Fun fact: Nb8-c6 was a novelty there as well. 13. d3e2  13... c8b7  14. h1h3 The rook is lifted from the other side this time! 14... a8c8  15. h3g3  15... g8h8 Necessary prophylaxis. 16. a2a3 Whereas this one  was not mandatory. 16... c6a5 The knight is ready to chase the enemy bishop from the long  diagonal. And not only that... 17. e2d3  17... a5c4 Pressing the white pieces in time. Nepomniachtchi  desperately needs open files and diagonals. 18. e1f1  18... c4d6 The end of an excellent knight maneuver. The knight is not  only putting pressure on the e4-pawn but is ready to help his own king and even counterattack. 19. d4d5 At last White opens the diagonals, but this  idea is flawed with the super-knight around. 19... e6d5 