For Carlsen there are two pleasant opponents and three less comfortable ones in the tournament, listing them in head to head order:
Nakamura +8-0=15
Radjabov +8-1=17
Karjakin +3-1=11
Caruana +3-2=6
Mamedyarov +1-1=6
Mamedyarov has only played one game against Carlsen the last six years, and the one player in the field he has a minus score against is Radjabov.
Nakamura's stats against the non-World Champions in the field look rather good, with +3 against Caruana and Karjakin, +1 against Radjabov and -1 against Mamedyarov.
Karjakin's stats look bad with minus scores against all opponents, -3 against Caruana and Nakamura, -2 against Carlsen, and -1 against Radjabov and Mamedyarov.
A week left until the Gashimov Memorial starts with this field:
#1 Carlsen 2881
#5 Caruana 2783
#7 Karjakin 2772
#9 Nakamura 2772
#10 Mamedyarov 2760
#33 Radjabov 2713
Average rating 2780, and one of the "youngest" super tournaments ever with all participants in their 20s.
Carlsen's latest loss came June 15th, against Caruana. Maybe it's time for his first loss in ten months, or his first loss against Nakamura, who is the only player in the field not to have beaten Carlsen in classical chess.