Premier League rivals Tottenham Hotspur and Liverpool sweated out a drab goalless draw in a steamy M&T Bank Stadium in Baltimore on Saturday.
Friendly: Liverpool 0-0 Tottenham
Both sides starting line-ups were a blend of youth and experience, with Adam Morgan, 18, leading the line for the Reds and Harry Kane, 19, stepping in to replace Jermain Defoe for Spurs.
Tottenham came closest to breaking the deadlock three minutes before the interval when Kane flicked the ball to Aaron Lennon, who struck the post from a few yards out.
Both teams were affected by the high temperatures, which took much of the pace out of the match, as new managers Andre Villas-Boas and Brendan Rodgers, of Spurs and Liverpool respectively, ran the rule over their players.
Liverpool now head to Belarus for a Europa League tie after a winless North American tour. Tottenham's next game is against New York Red Bulls on Tuesday.
Chelsea suffered a 1-0 defeat to Serie A side AC Milan as Urby Emanuelson got the only goal.
Emanuelson was on hand to tap home the rebound from close range after 67 minutes when a shot from Stephan El Shaarawy was saved by Petr Cech.
Chelsea's best chance came early in the game but when Lampard's delivery was headed back across goal by Branislav Ivanovic the loose ball was fired over the bar by John Terry who slipped just as he was about to shoot.
Lampard nearly set up Emanuelson for the opener early in the second half when he gave the ball away to the Dutchman but after beating Terry he shot at Cech.
Emanuelson made no mistake with 13 minutes to go when he forced the ball home following Cech's save from El Shaarawy.
The Chelsea goalkeeper then did well to save at the feet of Mattia Valoti as Milan tried to extend their lead late in the game.
Despite the defeat at least manager Roberto Di Matteo got to see summer signings Eden Hazard and Marko Marin in action for the Blues on the latest leg of their tour of the United States.
Wigan were given a workout by Bundesliga side Hoffenheim but held on for a 1-1 draw against the Germans.
The Latics were in front after 25 minutes in Bad Wimsbach, Austria with a well-struck volley from Mauro Boselli.
Hoffenheim's equaliser from French centre-back Matthieu Delpierre five minutes before the interval was followed by a dominant second-half display by the Germans. However, Roberto Martinez's Wigan weathered the storm well.
West Brom manager Steve Clarke watched his side waste a number of chances as they played out a goalless draw against Barnsley at Oakwell.
Despite dominating proceedings the Baggies were unable to make their openings count, with Shane Long hitting the post in the second half with a header.
Clarke can take some consolation from the fact Zoltan Gera made his first start in eight months as he continues his comeback from a knee injury.
Southampton's pre-season fixture at St Mary's ended in a 1-0 defeat to Eredivisie champions Ajax. Aras Ozbiliz's goal separated the two sides, the young winger finding the target after 64 minutes with a low strike.
Norwich enjoyed a better result in their friendly at Peterborough, beating the London Road outfit 2-0. Steve Morison gave the Canaries the lead after 32 minutes and James Vaughan wrapped up the scoring four minutes from time.