vs Gold Medal Race
Here's a quick overview of the gold medal chances the two nations have going into Day 14 (note I am being generous about their chances)
China
Athletics - Women's 20km Walk
Athletics - Women's Javelin Throw
Karate - Women's -61kg
Table Tennis - Men's Team
Wrestling - Women's Freestyle -53kg
United States
Athletics - Women's 400m
Athletics - Women's 4x100m Relay
Karate - Men's -75kg
Volleyball - Women's Beach Volleyball
Wrestling - Men's Freestyle -125kg
Interestingly, an even match for Day 14. China has the most secured gold medal (table tennis), but the United States may end the day just edging out China.
Of course there are future gold medal chances at risk going into Day 14, here are the events where the gold medal chance may be extinguished due to an early loss.
China
Boxing - Women's Middleweight
Canoeing - Women's C2 500m
Cycling - Women's Individual Sprint
Diving - Men's 10m Platform
Wrestling - Women's Freestyle -50kg
United States
Basketball - Women's Tournament
Boxing - Men's Lightweight
Volleyball - Women's Indoor Tournament
Wrestling - Men's Freestyle -97kg
Wrestling - Women's Freestyle -50kg
I suspect there will be some gold medal chances loss between the two nations. Obviously each loss for the United States will make things harder, at the very worst they must match their losses with China.