At the London Marathon and across the world of sports, there have been countless displays of support and sympathy for the victims of the Boston Marathon bombing on April 15.

At a moving pregame ceremony in the first game at Fenway Park following the bombing and subsequent manhunt for the suspects, David Ortiz delivered a powerful message. "This is our (expletive) city. Stay strong."

After defeating the Florida Panthers on Sunday, the Boston Bruins gave their game jerseys to members of the law enforcement agencies that aided in the investigation and manhunt for the bombing suspects. Law enforcement officers have been given a hero's welcome anywhere they've gone since capturing the second suspect on Friday.

As the national anthem played prior to the start of a playoff series against the Knicks, Celtics center Kevin Garnett wore a shirt with one of the popular slogans that emerged as the city sought unity in the aftermath of the tragedy.

Spectators of the London Marathon held this sign for runners on a pedestrian bridge over the race course.

Aston Dobston of London shows off his finisher's medal from the London Marathon. He ran the race in a Kevin Garnett jersey "out of respect for Boston." Globe staff photo Shira Springer

Players of FC Barcelona observe a minute of silence for the victims of the Boston Marathon bomb attacks before their soccer match against Levante UD at Camp Nou in Barcelona.

The Red Sox wore special versions of their home whites for their first two games against the Royals this weekend. The traditional "Red Sox" was replaced by "Boston."

You did not need to be entered in a major marathon to show support for Boston. Here' a group of runners in New York's Central Park included one wearing a Red Sox cap prior to a fun run.

At the Red Sox' game Saturday, the first pitches were thrown out by Matt Paterson, who aided the injured during the Boston Marathon bombings, Steven Byrne, who was injured during the bombings, and Dick Hoyt and his son Richard Hoyt, who compete in the race every year.

Members of teams Mexico and Peru display a banner in honor of the victims of the Boston Marathon bombing before the start of their soccer match in San Francisco, CA. on April 17.

At the Hamburg Marathon in Germany, there were many displays of support. According to the Globe's Derrick Jackson, who ran in it: "They held a moment of silence, played Sweet Caroline before the start and many people wore Run For Boston bracelets."

Law enforcement officers stood at attention during pregame ceremonies before the Red Sox baseball game at Fenway Park.

Bruins players Andrew Ference (right) and Chris Kelly joined their teammates in wearing hats from local law enforcement agencies prior to playing the Penguins on Saturday.

A Knicks fan and a Celtics fan worked together to hold up a "Believe in Boston" banner in the stands before their teams clashed in the NBA playoffs in New York.

Rene Rancourt saluted the Watertown Police Honor Guard during the playing of the national anthem at the start of Sunday's game. Rancourt let the crowd finish the national anthem at each of the Bruins' three home games since the terror attack.

Penguins goalieTomas Vokoun wore a 617 sticker – the Boston area code – and his teammates wore similar patches on their jerseys.

The Yankees and Red Sox are bitter rivals, but the teams put aside their differences in the wake of Monday’s deadly Boston Marathon bombings. Fans entering Yankee Stadium Tuesday saw this tribute to the Red Sox.

A "B Strong" logo was displayed on Greg Biffle's NASCAR car at Kansas Speedway.

At the San Isidro 5K Run in Lima, Peru, a minute of silence was observed by the runners before the race started, followed by a release of white balloons in tribute to the victims of the Boston Marathon bombings.

The tribute to the Red Sox carried inside Yankee Stadium for New York’s game vs. the Arizona Diamondbacks.

In maybe the most poignant tribute, the Yankees played “Sweet Caroline”, an iconic Neil Diamond song played each game at Fenway Park, after the third inning.

The Swedish and United States teams paused along with fans and tournament officials for a minute of silence during a tribute to victims of the Boston Marathon bombing at the Fed Cup World Group Playoff at the Delray Beach Tennis Center in Delray, Beach, Fla.

Philadelphia Phillies center fielder Ben Revere taped a message onto his glove that read, “Pray for Boston.”

Shane Victorino of the Red Sox sat in the dugout in Cleveland with a jersey paying tribute to those affected by event in Boston prior to the start of the game between the Indians and Sox at Progressive Field in Cleveland.

Arsenal and Everton players held a minute's silence in memory of those killed in the Boston Marathon bombings ahead of the English Premier League football match between the teams at The Emirates Stadium in north London.

Runners stood together during the playing of the national anthem as the Baptist Health South Florida Brickell Run Club honored the Boston victims in Miami. The event drew approximately 1,000 people.

In Miami, runner Michael Zapelini wore a shirt on which he wrote, "Boston 2013 We Will Not Be Divided.”

The crowd sang along to "Sweet Caroline" in the eighth inning of Tuesday’s game between the Miami Marlins and the Washington Nationals.

A Phoenix Coyotes fan held up a sign as a tribute to the victims Monday night. The San Jose Sharks defeated the Coyotes, 4-0.

Phoenix Coyotes plauer Keith Yandle, who is from Boston, skates on the ice with "Pray For Boston" on the inside his left skate.

The iconic racing sausages did their thing during the sixth inning of a baseball game between the Milwaukee Brewers and the San Francisco Giants Tuesday. The Brewers played the iconic “Cheers” theme as a tribute to Boston.

The London Marathon takes place this weekend. There is a moment of silence planned in London for the Boston victims.

Fans observed a moment of silence for victims of the Monday bombings at an NHL hockey game between the St. Louis Blues and the Vancouver Canucks on Tuesday in St. Louis.

The Montreal Canadiens, bitter rivals of the Boston Bruins, turned down the lights for a moment of silence before their game with the Philadelphia Flyers.

The Washington Capitals held a moment of silence before their game with the Toronto Maple Leafs Tuesday.

Members of the Calgary Flames' observe a moment of silence for before a game against Minnesota.

Singer Neil Diamond, whose song "Sweet Caroline" has become a Boston sports anthem and was played at sports venues around the world to recognize the Boston tragedy, traveled to Fenway Park to perform the song himself on Saturday.

A participant wearing a singlet in tribute to victims of the Boston Marathon bombing, walks holding a miniature U.S. flag after a race organized by the New York Road Runners at Central Park in New York April 21.