Portland Thorns FC scored three goals in nine minutes Wednesday night to defeat the visiting Racing Louisville FC at Providence Park. Racing withstood an early first-half barrage from Portland and grew into the game 30 minutes in, with Emina Ekic hitting the crossbar in the 35th minute. But Portland’s fast start to the second half, with goals in the 47th, 48th and 56th minutes, gave the Thorns firm control of the game and pushed them back into first place in the NWSL. “They were the better team today,” Racing coach Kim Björkegren said. “… The girls worked hard over 90…