Goalkeeper David Martin was “in tears” after a debut where West Ham ended a seven-game winless run with victory at Chelsea.
Martin, the son of Hammers legend Alvin, was picked by boss Manuel Pellegrini instead of Spanish keeper Roberto, who had conceded nine goal in three games.
And it proved an inspired choice as the visitors kept a first clean sheet since 22 September and achieved a first victory at Chelsea for 17 years.
Aaron Cresswell scored the winner three minutes after the break as he cut inside and fired low past Kepa Arrizabalaga.
Chelsea had plenty of chances early on as Christian Pulisic missed the target from a few yards out. The American also wasted a great opportunity late on.
But West Ham relieved the pressure on Pellegrini as 33-year-old Martin also made it a Premier League debut to remember.
The former Millwall and MK Dons keeper sank to his knees before celebrating in the stands with his father, who played in the West Ham defence for 21 years.
“It still doesn’t feel real,” said Martin, who is a boyhood fan. “I’m just pleased I got through it, I didn’t let anyone down and actually I enjoyed it in the end.
“My dad didn’t say much – I think we were both in tears. For my dad to play for the club for 21 years and see it, and for me to make my debut, keep a clean sheet and get win for the boys, it is so pleasing.
“I was struggling to eat for two days; Cressa [Cresswell] was laughing at me because my plate was taken away because I couldn’t eat my food.
“I hope I’ve given myself a good chance [to keep my place] but I have to work hard and keep grounded.”
Victory lifted West Ham four points clear of the relegation zone while Chelsea failed to close the three-point gap to second-placed Manchester City and Leicester City in third.
Watch highlights of the match below;
