LONDON -- If Serena Williams?defeats?Angelique Kerber in the Wimbledon final (Saturday, 9 a.m. ET on ESPN/WatchESPN), she will equal Steffi Grafs modern-era record of 22 Grand Slam titles.However, the German has stopped that from happening once already, beating the world No. 1 in the Australian Open final in January. Here are five reasons Kerber could stop history from being made again:Melbourne memoriesUsually, its Williams who has the psychological advantage before a Grand Slam final. This time? Not so much. This is one of those rare occasions when a player can take great encouragement from a recent encounter with Williams at a major.Kerbers first Grand Slam triumph came at the Australian Open, when she defeated Williams in three sets. That was on a hard court, and Wimbledons 4-seed experienced a first-round clay-court blip at Roland Garros, but she ought to be feeling assured of her game.Williams woeSerena hasnt won a Grand Slam for a year, and twice already this season she has faltered in a major final when strongly favoured to win.Achieving a tally of 21 titles is special, but Williams seems stuck there. After that disappointment against Kerber in Melbourne, she lost to Spains Garbine Muguruza at Roland Garros last month.Add those two most recent Grand Slam defeats to the almighty shock in New York last season -- when she lost to Italys Roberta Vinci in the semifinals at the US Open -- and you can see a pattern emerging.One of Williams great strengths is her mental fortitude -- her will to win has won her countless matches and titles -- but she can also be prone to self-doubt and nerves.If Williams goes down a set, and Kerber is playing well, how will the American respond?Misleading matchupWilliams lopsided semifinal victory against Elena Vesnina is no guarantee of success in the final, even though she needed just 48 minutes to defeat the unseeded Russian 6-2, 6-0 in the fastest-ever Wimbledon semifinal.Recall what happened in Melbourne, where Williams was in command of her semifinal, beating Polands Agnieszka Radwanska for the loss of just four games, including one bagel set, only to then lose in the final to Kerber.There is a huge jump in class between Vesnina, the worlds No. 50, and Kerber, ranked No. 4 and a Grand Slam champion.Left-field dangerA good southpaw serve is always awkward for opponents, but never more so than on grass, where the ball skids away from the receiver.Kerbers view is that her left-handed delivery could be more of a weapon on the grass of Centre Court than it was on the hard of Melbournes Rod Laver Arena. I can serve a little better, and that makes me much more dangerous than on hard, she said.Williams has faced only right-handed opponents this fortnight, so she hasnt had any recent match practice against a lefty serve.Steffi sparkIts not just Williams who could take inspiration from modern-era Grand Slam record holder Steffi Graf on Saturday. On both sides of the net, the finalists will be thinking about Fraulein Forehand.The German has long been an important and influential figure in Kerbers tennis life. For years, she idolised Graf and watched her whenever she could. She has also studied some of the 47-year-olds highlights on YouTube.The connection between them was only strengthened by victory at the Australian Open, which made Kerber the first German woman to score a Slam since her idol won at Roland Garros in 1999.Kerber savours her opportunities to spend time with Graf. Now she will want to emulate Graf by becoming her countrys first female champion here in 20 years. 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He sat out the following game, a 108-107 win Saturday in Portland, before coming back to help send the Nuggets to their seventh consecutive loss. SPARTANBURG, S.C. -- Its pretty clear Kelvin Benjamin has firmly re-established himself as the Carolina Panthers No. 1 wide receiver with a wide array of big-time, circus-like catches in the first week of training camp.Not that it matters much to Benjamin, whod just assume blend back into the offense without much fanfare.You be a team guy, Benjamin said of his approach this season. Most teams with that No. 1 receiver who is getting all of the balls, they dont have a chance to go to the Super Bowl. But its all about going to the Super Bowl here.Those unselfish words dont surprise offensive coordinator Mike Shula, who said Benjamin has a lot of blue collar in him and whose primary motivation is winning games.Benjamin stormed on the scene as a rookie in 2014, quickly establishing himself as Cam Newtons favorite option in training camp. He went on to set franchise rookie records with 73 receptions for 1,008 yards and nine touchdowns.The 6-foot-5, 245-pound former Florida State star appeared set for a big season in 2015 before a torn ACL in training camp ended his season.That forced Newton to adjust and spread the ball around more. Nine different receivers had at least 10 receptions last season. Eight caught a touchdown pass from the league MVP.There has been chatter of whether Benjamins return might force Newton to re-establish a lock on him as he did two years ago.But fifth-year coach Ron Rivera doesnt see that happening. He said Newtons growth as a quarterback last season wont allow him to take a step back.I dont think were going to sit there and see him target Kelvin 20 times a game, Rivera said. I think he will keep the ball spread around like he did last year.Rivera said he expects Newton will target seven to 10 different receivers a game.Shula agrees.With Kelvin there (in 2014) and Steve (Smith) there the year before, maybe Cam felt like he had to go to either (Pro Bowl tight end) Greg (Olsen) or Kelvin, or Greg or Steve, Shula said.But with how the other guys stepped up last year, we can move guys around more. Hopefully it will help present more problems for the defense, where they are more conscious about covering multiple guys. And defenses have to worrry about the running game as well.ddddddddddddBut if training camp is any indication, Benjamin will be the top targeted receiver.Its hard to blame Newton when he has an option such as Benjamin running across the field.In most cases, Newton doesnt have to be completely accurate -- he simply needs to throw it up in the general vicinity for Benjamin to make the catch.I know hes excited, emotional, a lot of things going through his head right now, Newton said, but just to see him get the confidence and him to get back in the groove of things is good.Benjamin said it was difficult at times watching from the sideline last season as the Panthers opened the season 14-0. He wanted to be a part of the winning, but despite trying to put on a good face still felt like an outsider at times.It was even tougher when the Panthers, who finished No. 1 in the league in scoring last season, struggled offensively in a 24-10 loss to the Denver Broncos in the Super Bowl.I just wanted to go catch a few balls, said Benjamin, who watched the game from the sideline in street clothes.Benjamin said the time away from the game helped him refocus on the importance of his football career.Hes come into the season in better shape physically than he did as a rookie, and is eager to cut down on his mistakes. He dropped 11 passes in 2014 and ran the wrong route a number of times, one of them leading to costly interception late in a Carolina loss.The 25-year-old Benjamin said he has plenty of room for improvement despite his big numbers in 2014.Once youre having a little success and something happens to you, it sits you down and lets you see that something can go wrong just like that, Benjamin said.Game notes Rivera said defensive end Kony Ealy is in the concussion protocol after getting hit in the head late in practice Friday. He did not practice Saturday. ... Benjamin and defensive end Charles Johnson were given veteran days off on Saturday to recuperate from past injuries.---Online: AP NFL website: www.pro32.ap.org and AP NFL Twitter feed: www.twitter.com/AP-NFL ' ' '