[SUMMER OF SOCCER] Another summer of soccer begins Wednesday when the Seattle Sounders host European champion Chelsea in the opening game of the World Football Challenge. Chelsea is bringing its newest signings, 21-year-old Belgian midfielder Eden Hazard and 23-year-old German winger Marko Marin, though it will be without Ashley Cole, John Terry, Florent Malouda, Raul Meireles and Fernando Torres, all on vacation until later in the tour after playing this summer at Euro 2012.

Also on Wednesday, Philadelphia Union will host Aston Villa (England).

This summer's visitors include Real Madrid and AC Milan and three French clubs, including Montpellier and Lyon, which will play in the French Super Cup at Red Bull Arena.
 
July 18
Seattle Sounders vs. Chelsea (England) - World Football Challenge
Philadelphia Union vs. Aston Villa (England)

July 21
Toronto vs. Liverpool (England) - World Football Challenge
(at Rogers Centre)
Chicago Fire vs. Aston Villa (England)

July 22
Chelsea (England) vs. Paris SG (France)
(at Yankee Stadium, New York)
Roma (Italy) vs. Zaglebie (Poland)
(at Wrigley Field, Chicago)

July 24
LA Galaxy vs. Tottenham (England)
Sporting Kansas City vs. Montpellier (France)
Colorado Rapids vs. Swansea City (England)
Columbus Crew vs. Stoke City (England)
Montreal Impact vs. Lyon (France)
Portland Timbers vs. Aston Villa (England)

July 25
MLS All Stars vs. Chelsea (England)
(at PPL Park, Chester, Pa.)
Roma (Italy) vs. Liverpool(England)
(at Fenway Park, Boston)

July 27
Roma (Italy) vs. El Salvador (national team)
(at Red Bull Arena, Harrison, N.J.)

July 28
D.C. United vs. Paris SG (France)
Chelsea (England) vs. AC Milan (Italy)
(at Sun Life Stadium, Miami)
Liverpool (England) vs. Tottenham (England)
(M+T Bank Stadium, Baltimore)
Montpellier (France) vs. Lyon (France) - French Super Cup
(Red Bull Arena, Harrison N.J.)

July 31
New York Red Bulls vs. Tottenham (England)
San Jose Earthquakes vs. Swansea City (England)

Aug. 1
Sporting Kansas City vs. Stoke City (England)

Aug. 2
LA Galaxy vs. Real Madrid (Spain)

Aug. 4
Milan (Italy) vs. Olimpia (Honduras)
(at Gillette Stadium, Foxboro, Mass.)

Aug. 5
Real Madrid (Spain) vs. Santos (Mexico)
(at Sam Boyd Stadium, Whitney Nev.)

Aug. 8
Milan (Italy) vs. Real Madrid (Spain)
(at Yankee Stadium, New York, NY)

Aug. 11
Real Madrid (Spain) vs. Celtic (Scotland)
(at Lincoln Financial Field, Philadelphia)