Question: Is the singles or doubles court more narrow?
About the article "Badminton", section "Singles".

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This is a list of the main career statistics of Australian former tennis player Margaret Court.
Court won 62 Grand Slam events (24 singles, 19 doubles, 19 mixed doubles), which is a record for a male or female player.
Her 24 Grand Slam singles titles and 19 in mixed doubles are also all-time records across both sexes.
She achieved a career Grand Slam in singles, doubles and mixed doubles, is one of two women to have achieved "the" Grand Slam in singles in the Open Era (alongside Steffi Graf), and is the only woman to have achieved the mixed doubles Grand Slam, which she did twice.
Court won more than half of the Grand Slam singles tournaments she played (24 of 47) She won 192 singles titles before and after the Open Era, an all-time record.
Her career singles win-loss record was 1,177-106, for a winning percentage of 91.74 percent on all surfaces (hard, clay, grass, carpet), is also an all-time record.
She won at least 100 singles matches in 1965 (113-8), 1968 (107-12), 1970 (113-6), and 1973 (100-5).
She won more than 80 percent of her singles matches against top 10 players (297-73) and was the year-end top ranked player seven times. 
Though strategy is important in singles, it is even more important in doubles.
The additional width of the alleys on the doubles court has a great effect on the angles possible in doubles play.
Consequently, doubles is known as a game of angles.
There are three basic doubles strategies:  both-up strategy (also called "two-up" strategy)  up-and-back strategy (also called "one-up/one-back" or "I" strategy)  both-back strategy (also called "two-back" strategy)  
Players are divided into two teams and wait with one team behind each baseline.
One player from each team steps up and a singles point is played out starting with a drop hit.
The person that wins adds another player from their team to the court while the player that loses goes to the end of their line and a new player replaces him or her.
This next point is played one vs. two with the team with only one person on the court starting the ball.
The team with one person on the court can use the doubles court while the team with multiple people on the court has to use the singles court.
If the team with two people on the court wins, they add another player and play one vs. three.
If they lose, all players on the court on that team go to the end of the line and one player replaces them.
The other team, the winning team, adds another player to the court.
If playing against one player, singles court must be used.
If playing against two or more players, doubles court can be used.
The game continues until an entire team is on the court and wins the point.
This game is designed to practice ball placement. 
Manner of play.
Tennis is played on a rectangular, flat surface, usually grass, clay, a hardcourt of concrete, and asphalt and occasionally carpet (indoor).
The court is 78 feet (23.77 m) long, and 27 feet (8.23 m) wide for singles matches and 36 ft (10.97 m) for doubles matches.
Additional clear space around the court is required in order for players to reach overrun balls.
A net is stretched across the full width of the court, parallel with the baselines, dividing it into two equal ends.
It is held up by either a metal cable or cord that can be no more than 0.8 cm (1/3 inch).
The net is 3 feet 6 inches (1.07 m) high at the posts and 3 feet (0.914 m) high in the center.
The net posts are 3 feet (0.914 m) outside the doubles court on each side or, for a singles net, 3 feet (0.914 m) outside the singles court on each side.
The modern tennis court owes its design to Major Walter Clopton Wingfield who, in 1873, patented a court much the same as the current one for his stické tennis (sphairistike).
This template was modified in 1875 to the court design that exists today, with markings similar to Wingfield's version, but with the hourglass shape of his court changed to a rectangle. 
An informal and unsanctioned form of tennis, this is played with similar rules to Canadian doubles, only in this version, players rotate court position after each game.
As such, each player plays doubles and singles over the course of a match, with the singles player always serving.
Scoring styles vary, but one popular method is to assign a value of 2 points to each game, with the server taking both points if he or she holds serve, and the doubles team each taking one if they break.
Throughout Australia this format is usually known as "American doubles", whereas in South Africa you would call it "American singles", or cut-throat tennis.