The Labour leader, who has insisted the Conservatives lost the election despite being the largest party, was photographed by Times columnist Giles Coren at the football practice in sunny north London as the Prime Minister grappled with the fallout of losing her majority.
The political U-turn, created to shore up an increased majority ahead of impending Brexit negotiations, spectacularly backfired on the Prime Minister and her party, who lost 13 seats against their 2015 results. That strategy seemed to enable her to avoid public attention to the fundamental lie - that Britain could "have its cake and eat it" - peddled by the now-Foreign Secretary Boris Johnson and former Justice Minister Michael Gove, among others, during the Brexit campaign.
Seeking to capitalise on sky-high popularity ratings, she called the election a few weeks later, urging voters to give her a stronger mandate to go into Brexit talks that are expected to begin as early as June 19.
But the firestorm of criticism continued unabated early Saturday after May announced she would keep her ministerial team unchanged and planned to stay in power with the aid of a small Northern Irish party.
European Commission chief Jean-Claude Juncker added he hoped there would not be "further delay" in the talks that "we are desperately waiting for".
German Chancellor Angela Merkel said she assumed Britain still wanted to leave the European Union and talks should start quickly. At a speech outside 10 Downing Street, after returning from Buckingham Palace, Mrs May said the Conservatives and the DUP had enjoyed "a strong relationship over the years". She called the snap election to win a clear mandate for her plan to take Britain out of the EU's single market and customs union in order to cut immigration.
Even if the Conservatives had increased their majority materially, there was unlikely to be significant additional certainty about what Brexit meant.
British Prime Minister Theresa May struck a deal in principle with Northern Ireland's Democratic Unionist Party on Saturday to prop up the Conservative government, stripped of its majority in a disastrous election.
The Scottish National Party: Nicola Sturgeon's party won 56 of 59 Scottish seats in the 2015 election but lost ground on Thursday.
"Now, of course, if she's [May] got to be constantly making deals throughout this parliament, or indeed if she falls and there's a lot of negotiations or a lot of discussion as to whether she'll be leading this Conservative minority government". According to the Lord Ashcroft Polls, Brexit was the most important issue for 48% of Conservative voters, but only 8% of Labour voters. Instead, Cameron still would be prime minister, presiding over a majority government (however narrow) of a United Kingdom that was still part of Europe.
Plus, incumbent Theresa May is less likely to secure support from other parties given her inclination toward a hard Brexit, as per the source. "I think we need to see the final make-up of parliament and then we'll reflect on that", DUP leader Arlene Foster told Radio Ulster late Friday.
Media commentators agreed she had been badly damaged, and some predicted she and her strategy for Brexit could struggle to survive.
Many in the party believe she has been fatally wounded.
Former Conservative minister Anna Soubry, who just held onto her seat, said May was "in a very hard place" following a "dreadful campaign".
"It is not the outcome any of us would have wanted in the Conservative Party".
Despite campaigning against Brexit, Labour has accepted the result but said it would prioritise maintaining close economic ties with the EU.
But Elmar Brok, a German conservative and the European Parliament's top Brexit expert, told the Ruhr Nachrichten newspaper that the talks would now be more complicated.