Martin Braithwaite started his first game at the World Cup for Denmark as they assured their place in the knockout stages after drawing 0-0 with France.
The Boro forward came off the bench in the previous two group matches for the Danes, who won their tournament opener against Peru and drew with Australia.
Braithwaite, who started on the right for Denmark and played the entire 90 minutes, made a bright start to the game, surging forward with a few drives into the France penalty area.
The 27-year-old was joined on the pitch by former Boro midfielder Viktor Fischer, who was introduced with 20 minutes remaining as Denmark pressed for a goal, but neither side were able to make their opportunities count.
The draw with France means the Danes finish second in Group C and are likely to face Croatia in the round of 16 clash on Sunday.