单打 
单打[單-] dāndǎ* {E} n. 〈sport〉 singles ◆v. deal with one thing at a time
单打 单打 [dāndǎ] singles (in sports); CL:场[chǎng] 
單 单 simple [old] / old simple / argue brain needle simple [old] 打 打 strike / - / finger spike strike