a player who typically plays near the baseline using ground strokes, as distinguished from one who typically goes to the net.
Origin of baseliner
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
tennis a player who plays most of his or her shots from the back of court
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012