Answer based on context:

Coming off their Thanksgiving home win over the Jets, the Cowboys stayed at home, donned their throwbacks, and played a Week 13 Thursday night intraconference duel with the Green Bay Packers  This match-up would be the first time since 1990 (Giants & 49ers) that two 10-1 teams would meet each other. In the first quarter, Dallas trailed early as Packers kicker Mason Crosby made a 47-yard field goal.  Afterwards, the 'Boys took the lead as rookie kicker Nick Folk made a 26-yarder and a 51-yard field goal, along with QB Tony Romo completing a 3-yard TD pass to WR Patrick Crayton.  Later, Green Bay would reply with RB Ryan Grant getting a 62-yard TD run.  In the second quarter, the Cowboys responded with Romo completing a 26-yard TD pass to TE Anthony Fasano, along with a 10-yard TD pass to WR Terrell Owens.  The Packers would end the half with QB Aaron Rodgers completing an 11-yard TD pass to WR Greg Jennings. In the third quarter, Green Bay got a 1-yard TD run for the only score of the period.  In the fourth quarter, Dallas' Romo hooking up with Crayton again on a 4-yard TD pass.  The Packers' Crosby kicked a 52-yard field goal, and the 'Boys' Folk made a 25-yard field goal. With the win, the Cowboys improved to 11-1 (continuing to be their best start in franchise history) and also clinched a playoff berth. Hall of Fame/Former Cowboy QBs Roger Staubach and Troy Aikman were in attendance as honorary captains, along with the commemoration of the Super Bowl anniversaries of the '77 Cowboys & the '92 Cowboys.  The Cowboys won the 10-1 duel with the win and improved to 11-1 while the Packers fell to 10-2. For Tony Romo, he ended this part of the season with a franchise-best 33 touchdown passes.

How many losses did the Packers have to start the game?
1