Harry Redknapp credited West Brom for making our task so difficult in Tuesday night's 1-0 win at the Lane.
Jermain Defoe struck the only goal of the game in the 62nd minute as we consolidated further our third place in the Premier League.
The Baggies set-up to make life difficult for us and that proved the case.
Even though we dominated possession, chances were few and far between and it took a real poacher's goal from JD to unlock a stubborn West Brom defence.
Injuries didn't help our cause as we lost Sandro in the first half - we were already without Scott Parker in central midfield - and then William Gallas and Jake Livermore in the second half.
Sensing a chance to open the game up, the visitors finally tested Brad Friedel via Somen Tchoyi's late 25-yarder but there could only be one deserved winner on the night.
"It was very important for us to stay up there (in the table) and it was a hard night," said Harry.
"They had injuries, Roy set them up to be difficult to beat and they were difficult to break down.
"They were sitting in deep and there was no space. We like to hit teams on the counter-attack but if they aren’t coming out, it’s very difficult.
"They did their jobs, closed all the holes and we couldn't find too many gaps to get in to create the chances.
"In the end, Jermain stuck a goal away and that was the difference, but it wasn't easy for us."
Meanwhile, Harry confirmed that Sandro and William suffered calf injuries while Jake needed stitches in a mouth wound following a clash of heads with Younes Kaboul.