Inter had already beaten Lyon and Bayern Munich without conceding a goal in the tournament and Luciano Spalletti's men made it three out of three in humid conditions on Saturday.
DRV PNK Stadium will host the five-time Champions League winners as they face their second pre-season fixture after drawing 1-1 with Olota Spanish Division 2 team on July 13.
But Gomes was the difference and the result continues a perfect run in four pre-season matches for Ole Gunnar Solskjaer's men while Spurs have won one of their two pre-season games so far.
Atletico finished fourth last season in a group with Porto, Bayer Leverkusen and Club Brugge, missing out on the Europa League as well. Before that, it had failed to advance past the Champions League group stage only once in nine seasons.
Pep Guardiola's men were stunned 2-1 by Newcastle on Tuesday, but the Reds' inability to overcome Leicester the following day means that they are still in touch.
The England forward said during pre-season that he welcomes the added competition up front following the arrival of club record signing Alexandre Lacazette .
Blues captain John Terry, who is leaving theclub at the end of theseason, came on late in the match to make his first league appearance since November.
Marcus Rashford's double ensured Manchester United maintained their perfect away record in the Premier League this season with a comeback victory over bottom club Sheffield United.
They were reduced to 10 men when Reece James was shown a second yellow card for a foul on Gordon, before the former Everton man completed the scoring late on.
Chelsea emerged from the crisis that has cast a cloud over theclub in stunning fashion as they comprehensively outclassed Aston Villa in their FA Cup fourth-round replay.